The W80 is a type of thermonuclear warhead developed by the United States. It is designed for use in the B61 and W76 nuclear weapons systems, primarily deployed on submarines and bombers. The W80 has a variable yield, allowing it to be adjusted for different military scenarios. This warhead is notable for its compact size and advanced design, which enhances its reliability and safety. The W80 is part of the U.S. nuclear arsenal, contributing to the country's strategic deterrence capabilities during the Cold War and beyond.