These are consolidated appeals of four manufacturers of asbestos, following judgment for the government on appellants' claims for contribution for asbestos-related damages arising from the Portsmouth Naval Shipyard (PNS) in Kittery, Maine. The trial court1 found that the government was negligent under Maine law in its operation of the shipyard, a government-owned facility. The court found that this negligence was the proximate cause of death of Joan Dube, the daughter of a shipyard worker, who had been exposed to asbestos fibers carried home on her father's work clothes.2 However, on its reading of the case law concerning the discretionary function exception to the Federal Tort Claims Act (FTCA), 28 U.S.C. Sec. 2680(a), the court determined that the government was immune from liability. We conclude that the exception is inapplicable on the record in this case, and reverse.

From age nine and until her marriage, from 1959 to 1973, Joan Dube was exposed to asbestos dust from her father's work clothes. Throughout this period, her father worked at PNS as a pipe insulator and routinely handled asbestos products. Before her death in 1984 of mesothelioma, Joan Dube initiated an action against four asbestos manufacturers whose products were used at PNS. These claims were eventually settled for the amount of $512,000.

The manufacturers--third party plaintiffs Raymark Industries, Inc., Owens-Illinois, Inc., Celotex Corp., and Eagle-Picher Industries, Inc.--brought contribution actions against the United States under the FTCA, 28 U.S.C. Secs. 1346(b), 2671-2680. After a bench trial, the district court found the following:

-Joan Dube's death resulted from her exposure to asbestos;

-the asbestos was produced by third party plaintiffs and used at PNS, where her father worked as a civilian for the United States Navy;

-the United States knew or should have known in October of 1964 that asbestos could cause mesothelioma in people like Joan Dube exposed in a domestic context; medical science cannot yet determine which exposures to asbestos over a period of time actually cause mesothelioma;

-the United States Navy and PNS had no policies or practice, prior to 1964 or thereafter through the period of Joan Dube's exposure, either to warn of the dangers of asbestos exposure to workers' family members, or to protect these "domestic bystanders";

-the United States was negligent under Maine law for failing to warn, either directly or through workers, domestic bystanders of the dangers of asbestos exposure after it learned of those dangers in 1964; all of Joan Dube's exposure, from 1959 to 1973, was the legal cause of her death;

-considering the respective degrees of fault and causation, the United States was responsible for one-third of Joan Dube's damages.

None of these findings are challenged on appeal. Rather, the sole issue before us is whether the trial court properly applied the discretionary function exception of the FTCA. The United States conceded, and the court recognized, that the Navy had never adopted or considered a policy of warning domestic bystanders of asbestos hazards. Yet in the court's view, since it could have considered and rejected a policy of warning or protecting domestic bystanders, its failure to warn cannot lead to liability under the discretionary function exception.3

The manufacturers press two arguments on appeal. First, they argue that the Supreme Court's opinion in Berkovitz v. United States, --- U.S. ----, 108 S. Ct. 1954, 100 L. Ed. 2d 531 (1988), handed down four days after the trial court's disposition of this case, requires reversal based on Navy officials' failure to comply with mandatory regulations. Second, they argue more generally that the Navy's failure to warn domestic bystanders does not fall within the scope of discretionary activity to which the exception was meant to apply. We address these arguments in turn.

II. ALLEGED FAILURE TO COMPLY WITH MANDATORY REGULATIONS

In Berkovitz, the Court held that mandatory regulations can remove an official's discretion, and thereby withdraw his conduct from the scope of the discretionary function exception. At issue in that case was a government agency's failure to determine that certain required tests for purity and safety of a polio vaccine had been satisfied before its release for public use. Because the applicable statutes and regulations left no room for the exercise of discretion by the government employees charged with their implementation, the Court concluded that the failure of agency personnel to assure compliance with the testing requirements before licensing the vaccine was actionable under the FTCA. The manufacturers point to two Navy regulations which they say remove the Navy's discretion not to warn domestic bystanders.

A. Failure to Warn of a Known Hazard.

The manufacturers base their Berkovitz argument chiefly on one of the Navy's regulations contained in the Department of Navy Safety Precautions for Shore Activities, NAVSO P-2455 (April 1965). Section 0103.4.b provides:

Warning Others. Each individual concerned shall warn others whom he believes to be endangered by known hazards or by failure to observe safety precautions.

The manufacturers argue that this mandatory regulation, when combined with the trial court's finding that the Navy failed to warn either its workers or their families of the dangers of domestic exposure to asbestos, dictates reversal under Berkovitz. Although this argument is not without force, and is supported by PNS commanders' testimony, we prefer not to rest our conclusion on it.

Reading the Safety Precautions for Shore Activities in their entirety, we think it is apparent that the quoted subsection outlines the responsibilities of on-site workers, as distinct from their supervisors.4 Section 0103.4 is titled "Operating Personnel," and follows Sec. 0103.1 directed to "Commanding Officers," Sec. 0103.2 directed to "Safety Officer," and Sec. 0103.3 directed to "Supervisory Personnel." In this context, Sec. 0103.4 appears directed at having on-site workers warn their fellow workers of dangerous conditions in the immediate work areas of which they have specific, actual knowledge. We do not disturb the trial court's determination that, as a matter of Maine tort law, the Navy was properly charged with knowledge of the risk to domestic bystanders as of October 1964. Yet it would require a leap of logic to then attribute such constructive knowledge to on-site workers with no actual knowledge of the danger.5 Even if the Navy's constructive knowledge of the risk to domestic bystanders could be imputed to workers, it would not advance the manufacturers' case. Section 0103.4.b requires the person concerned to warn others "whom he believes to be endangered by known hazards." Id. (emphasis added). That one believes another to be in danger means subjective, actual knowledge. The manufacturers have not shown that any PNS asbestos worker actually believed that domestic bystanders were at risk and failed to inform Joan Dube's father.

As a separate challenge to the manufacturers' Berkovitz claims, the United States argues that Sec. 0103.4 cannot serve to remove Navy discretion because it is not sufficiently "specific." In reviewing the regulatory framework at issue in Berkovitz, the Court characterized the statutes and regulations that served to remove agency employees' discretion as "a specific statutory and regulatory directive." 108 S. Ct. at 1962. The Court indicated more generally: "When a suit charges an agency with failing to act in accord with a specific mandatory directive, the discretionary function exception does not apply." Id. at 1963. The Court engaged in a painstaking analysis of the precise statutory mandate and associated regulations establishing the Division of Biologic Standards' obligation to assure compliance with adequate testing procedures before licensing polio vaccines.

We view the government's argument as persuasive as applied to Sec. 0103.4. The language of the regulation is so general that it does no more than establish a general policy of warning fellow workers of "known dangers." Cf. General Public Utilities Corp. v. United States, 551 F. Supp. 521, 526 (E.D.Pa.1982) (concluding that "plain language, legislative history, and regulations" pertaining to the Energy Reorganization Act of 1974 established that NRC had a duty to disseminate warnings of design defects in nuclear power plants). Even assuming, as understood by the Base Commander, that Sec. 103.4 applied to supervisory personnel, the broad language of the regulation suggests that those charged with its implementation retained wide latitude regarding its execution.6 Thus there was no "specific mandatory directive" to warn comparable to the regulations analyzed in Berkovitz.

B. Failure to Insure Adherence to Safety Precautions.

Through March of 1970, Sec. 0103.3 of the Safety Precautions for Shore Activities provided:

It is the responsibility of supervisory personnel to see that safety precautions are strictly observed in their own work area.

This regulation differs from Sec. 0103.4 in two important respects. First, it is clearly directed to supervisors. Supervisors may be sufficiently analogous to "management" in the private sector that the Navy's constructive knowledge of asbestos dangers is properly attributable to them. Second, the mandate is more precise both in tone ("strictly observed") and because it incorporates potentially detailed safety precautions tailored to particular work areas. If required safety precautions for the work area of Joan Dube's father were violated, and if compliance would have averted Dube's exposure, then the failure of the father's supervisor to assure strict observance would appear to render the discretionary function exception inapplicable under Berkovitz.

The manufacturers claim that uncontroverted evidence shows that safety precautions directed to the handling of asbestos at PNS were not adhered to. Yet the existence of and compliance with mandatory safety precautions governing the work area of Joan Dube's father is an open question. The Safety Precautions for Shore Activities, NAVSO P-2455, CH-1 (June 1967), indicate only that "Each individual concerned shall wear or use protective clothing or equipment of the type indicated and approved for the safe performance of his work or duty." Sec. 0103.4.c. These Safety Precautions do not specify, however, whether any such protective clothing or equipment was required to be used by Joan Dube's father. Through March of 1970, the Safety Precautions provided:

The following precautions should be taken in any dust making operations involving asbestos products:

a. Provide permanent general ventilation....b. Install exhaust hoods over saws and other dust making machine tools.

...

d. Use industrial vacuum cleaners in lieu of dry sweeping floors and other surfaces.

Id. at Sec. 2058.2 (emphasis added). As articulated in chapter one of the Safety Precautions, "Precautions which are not mandatory but are recommended or advisory in nature are indicated by use of the word 'should'." Sec. 0102.2. Thus it is not apparent from the Safety Precautions whether any mandatory precautions were applicable to Dube's father's work area through March of 1970. The Safety Precautions were changed in 1970, and again in 1971, to incorporate detailed and mandatory provisions concerning asbestos handling.7 The trial court specifically declined to make findings regarding the alleged failure of PNS to assure compliance with specific safety precautions pertaining to the handling of asbestos, and therefore could not have considered the relevance of the changes in its alternative judgment allocating liability. In any event, the government continues to dispute the existence and violation of such precautions. If such were necessary to resolve this case, we would have to remand for additional findings.8 The manufacturers' second argument makes this unnecessary.

III. FAILURE TO WARN AS A DISCRETIONARY FUNCTION

The United States shall be liable, respecting the provisions of this title relating to tort claims, in the same manner and to the same extent as a private individual under like circumstances....

28 U.S.C. Sec. 2674. As discussed in Part II, supra, matters pertaining to a "discretionary function" are exempted from liability under the Act. 28 U.S.C. Sec. 2680(a). Courts have long struggled to determine what conduct is properly deemed within the scope of government discretion under Sec. 2680(a). Recent courts have approached the question with little more than the basic precept framing the issue; "whether the challenged acts of a Government employee--whatever his or her rank--are of the nature and quality that Congress intended to shield from tort liability." United States v. S.A. Empresa de Viacao Aerea Rio Grandense (Varig Airlines), 467 U.S. 797, 813, 104 S. Ct. 2755, 2764, 81 L. Ed. 2d 660 (1984). While Varig Airlines and Berkovitz have improved matters, we still share Judge Becker's appraisal: "Rather than a seamless web, however, we found the law in this area to be a patchwork quilt." Blessing v. United States, 447 F. Supp. 1160, 1167 (E.D.Pa.1978).

The trial court reasoned that Varig Airlines implicitly overruled a series of lower court decisions that had construed the discretionary function exception narrowly, resurrecting an earlier decision which had read the exception broadly. See Dalehite v. United States, 346 U.S. 15, 73 S. Ct. 956, 97 L. Ed. 1427 (1953) (4-3 decision).9 The Supreme Court's unanimous decision in Berkovitz, however, handed down a few days after the trial court's disposition of the instant case, signals a narrower reading of the discretionary function exception.

After reviewing the language and legislative history of the FTCA, and its own case law, the Court in Berkovitz emphasized that: "The discretionary function exception applies only to conduct that involves the permissible exercise of policy judgment." 108 S. Ct. at 1959. The government concedes that it made no such policy judgment in this case. The government never decided to forgo warning domestic bystanders; it simply failed (negligently, as determined by the trial court) to do so. "[C]onduct cannot be discretionary unless it involves an element of judgment or choice." Berkovitz, 108 S. Ct. at 1958. See also Dalehite, 346 U.S. at 34, 73 S.Ct. at 967 (the exception protects "the discretion of the executive or administrator to act according to one's judgment of the best course"); Arizona Maintenance Co. v. United States, 864 F.2d 1497, 1503 (9th Cir.1989), ("Under Berkovitz, the key inquiry is not whether the government employee has a choice, but whether that choice is a policy judgment"). Because there was no exercise of judgment, the government appears to fail the threshold test of establishing that its conduct was protected from liability under the exception. Contrast with Barnson v. United States, 816 F.2d 549 (10th Cir.1987) (affirmative decision by federal official not to warn uranium miners of risks of radiation exposure covered by the discretionary function exception); Begay v. United States, 768 F.2d 1059 (9th Cir.1985) (same); Ford v. American Motors Corp., 770 F.2d 465 (5th Cir.1985) (decision of postal service not to warn buyers of surplus vehicles of risk of rollovers was considered policy choice, and therefore within the discretionary function exception); Myslakowski v. United States, 806 F.2d 94 (6th Cir.1986) (same); Shirey v. United States, 582 F. Supp. 1251, 1257-62 (D.S.C.1984) (same).

Of course, the Navy did make an affirmative choice to own and operate a shipyard, and to use asbestos on its ships. In its seminal Dalehite decision, the Supreme Court held that a high level policy decision to institute a program of producing and exporting fertilizer made from ammonium nitrate, formerly used for production of explosives, insulated the actions of lower level officials in carrying out the plan. 346 U.S. at 35-36, 73 S.Ct. at 967-68. But unlike the situation in Dalehite, the Navy's decision to use asbestos in its ships cannot shield it from liability based on its failure of care once it learned of the risk to domestic bystanders. While its language is sweeping, the holding in Dalehite turns on the existence of detailed plans and specifications laid out by policymaking officials. "The acts found to have been negligent were thus performed under the direction of a plan developed at a high level under a direct delegation of plan-making authority from the apex of the Executive Department." Id. at 39-40, 73 S.Ct. at 969-70. These officials planned, approved, and implemented the fertilizer program on notice of the inherent risks. See id. at 38-39, 46, 73 S. Ct. at 969-70, 973. That these officials consciously limited, in furtherance of the program, the extent to which safety precautions were researched and implemented was reinforced by the urgency of the government's efforts to rehabilitate war-torn Europe:

The Supreme Court pointed out that the decision to manufacture the fertilizer, in order to feed the people in the vanquished United States-occupied countries in the aftermath of World War II and thus lessen the danger of internal unrest, was a matter of cabinet-level government policy. The possibility of dangerous explosions resulting from fertilizer made from ingredients formerly used for explosives was known and a decision was made to produce the fertilizer despite the risks.

Shuman v. United States, 765 F.2d 283, 291 (1st Cir.1985). In short, government officials acting within the scope of their authority assumed the risk (though not the liability) of the fertilizer program based on public policy considerations. Nothing in the record before us or in the government's arguments demonstrates a similar deliberate acceptance of risk in the use and regulation of asbestos in Navy ships. While the Navy became charged with knowledge of the risk to domestic bystanders in 1964, it concedes it never considered whether those risks justified a warning. At a minimum, the regulations discussed in Part II, supra, suggest a general Navy policy favoring warnings of known dangers.

The trial court deemed the discretionary function exception applicable because the adoption of a policy of warning domestic bystanders was "susceptible of discretion." But the cases relied upon by the trial court in reaching this conclusion are distinguishable from the present case in one important respect. In the cited cases, plaintiffs claimed that the government decisionmaker failed to take into account important considerations; the claims were that his decision was negligently made. So long as such decisions were authorized and policy-based, claims that they were poorly made fall within the exception. But in none of the cases relied upon by the trial court did the government actor fail, as in the instant case, to make an affirmative decision. See U.S. Fidelity & Guar. Co. v. United States, 837 F.2d 116 (3rd Cir.1988); Allen v. United States, 816 F.2d 1417 (10th Cir.1987); In re Consolidated United States Atmospheric Testing Litigation, 820 F.2d 982 (9th Cir.1987). Each of these cases, and the trial court, quote Myslakowski v. United States, 806 F.2d 94 (6th Cir.1986). A portion of the quoted passage highlights the distinction we draw:

Stated otherwise, even the negligent failure of a discretionary government policymaker to consider all relevant aspects of a subject matter under consideration does not vitiate the discretionary character of the decision that is made.

Indeed, it is, in part, to provide immunity against liability for the consequences of negligent failure to consider the relevant, even critical, matters in discretionary decisionmaking that the statutory exception exists. If it were otherwise, a judgment-based policy determination made at the highest levels, to which all would concede that the statutory exception applies ... would result in no immunity if the decision could be shown to have been made without consideration of important, relevant factors, or was a decision negligently reached.

Id. at 97-98 (emphasis added).

We recognize that the "susceptible of discretion" approach of the trial court is a valid approach in some circumstances. Where the activity is a traditional governmental function, it is possible that failure to exercise judgment will remain within the discretionary function exception. As the Court said in Dalehite,

The legislative history indicates that while Congress desired to waive the Government's immunity from actions for injuries to person and property occasioned by the tortious conduct of its agents acting within the scope of business, it was not contemplated that the Government should be subject to liability arising from acts of a governmental nature or function. Section 2680(a) draws this distinction.

346 U.S. at 27-28, 73 S. Ct. at 963-64 (citations omitted). The exception covers: "Any claim ... based upon the exercise or performance or the failure to exercise or perform a discretionary function or duty on the part of a federal agency ... whether or not the discretion involved be abused." 28 U.S.C. Sec. 2680(a). Excepting liability even for failure to exercise discretion or for abuse of discretion is consistent with the view that this limitation of liability is directed at areas of activity where the government is under no affirmative duty to act in the first instance, or where government actors employ broad policy discretion in pursuit of the public good. Categories of such conduct include the regulation of private conduct, see Varig Airlines; Shuman, 765 F.2d 283, and the protection of the public from natural or manmade dangers. See, e.g., U.S. Fidelity & Guar. Co. v. United States, 837 F.2d 116 (3rd Cir.1988) (EPA discretion regarding manner of disposal of toxic chemicals); Cisco v. United States, 768 F.2d 788 (7th Cir.1985) (EPA discretion whether to warn households of danger from dioxin present in residential landfill); Brown v. United States, 790 F.2d 199 (1st Cir.1986) (discretion whether to repair weather buoy); Chute v. United States, 610 F.2d 7 (1st Cir.1979) (discretion regarding size of buoy marking sunken wreck); Mitchell v. United States, 787 F.2d 466 (9th Cir.1986) (discretionary FAA regulation regarding marking of power transmission ground wires). See also Blessing, 447 F. Supp. at 1172 n. 18 (citing cases). In such cases, the government's failure to consider whether to undertake a greater level of care generally remains within the exception.

But excepting a decision not to warn domestic bystanders in this case as susceptible of discretion loses sight of the structure of the FTCA. Under the FTCA, the government is liable in tort "in the same manner and to the same extent as a private individual under like circumstances." 28 U.S.C. Sec. 2674. As owner and operator of an industrial shipyard, the Navy had a duty under Maine law to exercise due care towards those foreseeably harmed by its activities. Where, as here, the nature of the activity places the government under a common law duty of care, the clause of the discretionary function exception most likely to protect the government from liability excepts "Any claim based upon any act or omission of an employee of the Government, exercising due care, in the execution of a statute or regulation." 28 U.S.C. Sec. 2680(a). The Navy points to no statute authorizing it to forgo warning domestic bystanders. Cf. Varig Airlines, 467 U.S. at 816, 104 S.Ct. at 2765-66 ("Congress specifically empowered the Secretary to establish and implement a mechanism for enforcing compliance with minimum safety standards according to her 'judgment of the best course,' " citing Dalehite 346 U.S. at 34, 73 S. Ct. at 967.); Begay v. United States, 768 F.2d 1059 (9th Cir.1985) (relying in part on statute authorizing Surgeon General to release test data "at such times and to such extent as [he] may determine to be in the public interest.") Even if the government were somehow authorized to avoid common law duty of care requirements, the FTCA attaches liability under state standards to PNS, unless the failure to consider a policy can be reconciled with exercising "due care." When the government is operating in a capacity so highly analogous to private industry, we doubt that the "susceptible of discretion" analysis can protect an official's negligent failure to act without an affirmative exercise of policy judgment, or without an express statutory preservation of the scope of an agency's discretion.10 See McMichael v. United States, 751 F.2d 303, 306 (8th Cir.1985) ("In this case, the Defense Department was pursuing a proprietary rather than a regulatory objective.... The Supreme Court's admonition [in Varig Airlines ] to avoid judicial second-guessing of regulatory decisions is thus not wholly applicable....").11

This contrasts with the situation presented in Smith v. Johns-Manville Corp., 795 F.2d 301 (3rd Cir.1986). In that case, the statute required the GSA to "[protect] the United States from avoidable loss" in the sale of surplus asbestos. 50 U.S.C. Sec. 98b(e). This authorized the GSA to forgo warning labels that might otherwise be required under state law, and to sell surplus asbestos "as is," thereby requiring purchasers to assume the risk. Further, evidence adduced at trial clearly established that the decision not to place warning labels on packages of surplus asbestos was a deliberate policy choice.12

The difficulty with the "susceptible of discretion" approach used by the trial court is indicated by the Court's articulation in Berkovitz of the discretionary function standard: "The discretionary function exception applies only to conduct that involves the permissible exercise of policy judgment." 108 S. Ct. at 1959. Without an actual decision to forgo protecting or warning domestic bystanders, it is difficult to determine whether even the Navy would consider such a decision a permissible or impermissible exercise of policy judgment. Application of the exception where the agency fails to make a judgment threatens to turn the mandate of Varig Airlines on its head. As the Court there stated:

Judicial intervention in such decision making through private tort suits would require the courts to "second-guess" the political, social, and economic judgments of an agency exercising its regulatory function. It was precisely this sort of judicial intervention in policy-making that the discretionary function exception was designed to prevent.

467 U.S. at 820, 104 S. Ct. at 2768. But where there is no policy judgment, courts would be "second-guessing" by implying one.

Beyond the lack of a Navy policy judgment, the nature of a putative policy not to warn domestic bystanders is highly speculative. We do not need to enter the policymaking arena to observe that it is difficult to imagine the Navy justifying a decision not to issue a simple warning to domestic bystanders of such potentially devastating danger, based on economic or other policy grounds. Compare Shuman, 765 F.2d at 288 (noting trial court's finding that "adoption of conventional safety standards would not have involved significant costs or significant delay to the war effort"), with Johns-Manville, 795 F.2d 301, 306 n. 7 (recounting government official's assertion of the "substantial potential for great economic loss to the United States upon disposition" of large quantities of surplus asbestos, and his description of the substantial and avoidable costs of repackaging or relabeling same for sale to commercial buyers "better qualified than our own storage personnel to properly transport, unpackage, handle and use the material in their manufacturing processes").

Our decision that the government is not excepted from liability under the FTCA for its breach of a state law duty to warn finds support in a host of decisions. See, e.g., Angel v. United States, 775 F.2d 132, 145 (6th Cir.1985) (failure to warn of danger of high voltage wire); Aretz v. United States, 604 F.2d 417 (5th Cir.1979) (failure to label substance as explosive); Smith v. United States, 546 F.2d 872 (10th Cir.1976) (citing cases) (failure as landowner to post warning signs in national park); Stephens v. United States, 472 F. Supp. 998, 1009 (C.D.Ill.1979) (same); United States v. White, 211 F.2d 79 (9th Cir.1954) (failure of government as land owner to warn business invitee of danger from unexploded projectiles); Pierce v. United States, 142 F. Supp. 721 (E.D.Tenn.1955), aff'd, 235 F.2d 466 (6th Cir.1956) (failure to warn lineman of dangerous conditions in government-owned transmission facility); Annotation, Liability of United States for Failure to Warn of Danger or Hazard Resulting from Governmental Act or Omission as Affected by "Discretionary Function or Duty" Exception to Federal Tort Claims Act, 65 A.L.R.Fed. 358 (1983). See also Henderson v. United States, 784 F.2d 942, 943 n. 2 (9th Cir.1986) (safety decisions at government facility are operational in nature, and therefore not within the discretionary function exception); Merklin v. United States, 788 F.2d 172, 177 (3rd Cir.1986) (duty of government as supplier of dangerous chattel to warn those who will foreseeably come in contact with the product of its inherent risks not within the exception). Perhaps the district court's analysis in Pierce, by analogy, best summarizes our conclusion in this case:

The initial decision to construct [electrical substations] and the decision to reactivate surely involved an exercise of discretion for which no liability attaches. Also the decision to undertake the reactivation work at the particular time it was commenced and similar decision going to the over-all success of the project would necessarily involve decisions at high level in which the exercise of discretion in the choice of various alternative courses of action would be involved. Even the decision to construct electrical substations and bring high-voltage power onto the premises would constitute discretionary functions. However, the Court is unable to go further and say that once the discretion was exercised to construct substations, any discretion was involved in the subsequent ... failure to warn workmen of its dangerous condition when the rehabilitation program was commenced....

142 F.Supp. at 731.

We conclude that the Navy's failure to warn domestic bystanders of the risks associated with exposure to asbestos dust is not "of the nature and quality that Congress intended to shield from tort liability." Varig Airlines, 467 U.S. at 813, 104 S.Ct. at 2764. We therefore reverse the trial court's judgment for the United States, and remand for entry of judgment in accordance with the trial court's previous findings on negligence, causation, and allocation of liability.