The late 1940s and 1950s were a strange time in the United States. With the rise of the Soviet Union, the U.S. government and the public became increasingly paranoid. Senator Joseph McCarthy stoked fears of communists lurking in every neighborhood, and many citizens built in-home underground fallout shelters in hopes of surviving an impending nuclear war. On the military front, the U.S., desperate to stay ahead of the Soviet Union in the nuclear arms race — especially following Russia’s launch of Sputnik in October 1957 — devised some truly bizarre nuclear weapons tests and programs. How bizarre? Well, one such project aimed to detonate a nuclear bomb on the Moon, simply as a show of U.S. strength. Here are the details on that strange-but-true plan and other forgotten top-secret U.S. nuclear weapons projects from that era.