Operation Upshot-Knothole was a series of nuclear tests conducted by the United States in 1953 at the Nevada Test Site. This operation included 11 tests, with the aim of evaluating new nuclear weapons and improving military capabilities during the Cold War. The tests were notable for their use of various delivery methods, including aerial drops and ground detonations. The results contributed to advancements in nuclear technology and provided valuable data on the effects of nuclear explosions, influencing both military strategy and public policy regarding nuclear weapons.