Operation Greenhouse - Nuclear Test Film (1951)

Courtesy: U.S. Department of Energy

0800009 - Operation Greenhouse - 1951 - 22:00 - Pacific, Color - Operation Greenhouse was conducted in April and May of 1951. This test series consisted of four weapons related test shots from the 300-foot level on towers on the Enewetak Atoll Pacific Ocean, two of which greatly aided the pursuit of a hydrogen, or thermonuclear, device.
Carried out by the Atomic Energy Commission, the shots were:

Dog, April 7, 81 kilotons
Easy, April 20, 47 kilotons
George, May 8, 225 kilotons
Item, May 24, 45.5 kilotons

The George experiment proved an H-bomb was possible and led to a crash development program. Item was the first test of the boosting principle, which involved increasing the yield of a weapon.