The Cold War left a nuclear landscape whose remnants must still be sensitively managed. As NATO grapples with the future of its deterrence posture, it faces the contentious question of whether reducing or withdrawing forward-based U.S. nuclear weapons in Europe would unacceptably reduce the security of its member states. The weapons were intended to promote nuclear burden sharing through an Alliance-wide decision process. But the European aircraft that would drop them are aging and will need replacement or refitting. Decisions are needed soon on whether this should occur.