In Boyle v. United Technologies, Corp, 487 U.S. 500 (1988), the U.S. Supreme Court recognized, in the context of a design defect claim brought under state law, that where the government exercises its discretionary function with respect to a contract provision, a contractor may be shielded from liability under state tort law. To meet its burden of demonstrating entitlement to this defense, defendant must show that: the government approved reasonably precise specifications; the equipment conformed to those specifications; the supplier warned the government about the dangers of that were known to the supplier but not to the government. Id at 513. The defense is limited to circumstances where the state tort law duty poses a significant conflict with the duties imposed under a federal contract. Id at 507.