There have been many moments in history when the world came perilously close to a full-scale nuclear war, due to false alarms or miscommunication. One such moment is the only known time that a head of state has activated their nuclear briefcase.
During the Cold War, the CIA and KGB were in a constant game of cat and mouse to steal each other's secrets. David E. Hoffman talks with us about the work of one incredibly important spy, who is the subject of his latest book.
The Beijing underground city may sound like the stuff of legends, but it's a real place built to escape Soviets. Check out our HowStuffWorks article to learn more about the fact and fiction surrounding the city underneath Beijing.
During the Cold War, both the U.S. and the U.S.S.R. stockpiled weapons, eventually holding enough power to destroy the world several times over. Yet neither side actually used these weapons. Learn more about M.A.D. in our article on HowStuffWorks.