The Doomsday Clock is a symbolic clockface that the Bulletin has maintained since 1947 at its headquarters on the campus of the University of Chicago, that uses the analogy of the human race being at a time that is "minutes ...

B-2 Spirit is a multi-role stealth heavy bomber, capable of deploying both conventional and nuclear weapons. It is operated exclusively by the United States Air Force. In the 1970s, the U.S. military wanted a replacement for the aging (old) B-52 bomber. ...