B81B

B81B is a type of thermonuclear warhead developed by the United States. It is part of the B83 series of strategic bombs, which are designed to be carried by strategic bombers and intercontinental ballistic missiles. The B81B is a smaller variant of the B83, with a yield of approximately 340 kilotons of TNT, compared to the B83's 1.2 megatons. It is designed to be more maneuverable and accurate, with a smaller warhead and a reduced fallout radius. The B81B was first deployed in 1986 and remains in service with the United States Air Force and Navy. It is considered a key component of the U.S. nuclear deterrent, providing a flexible and survivable nuclear capability. The B81B is also known by its NATO reporting name, W81B.