Operation Greenhouse
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Image:Greenhouse George.jpg Image:Greenhouse Item.jpg Operation Greenhouse was the fifth American nuclear test series, the second conducted in 1951 and the first to test thermonuclear weapons (hydrogen bombs). Conducted at the new Pacific Proving Ground, all of the devices were mounted in large steel towers, to simulate air bursts.
A number of target buildings, including bunkers, homes and factories were built on Mujinkarikku Island as test subjects.
The "George" explosion was the world's first thermonuclear device, though it just a test device (the full device would be set off in the Ivy Mike explosion); "Item" was the first boosted fission weapon.
| Test Name | Date | Location | Yield | Note |
|---|---|---|---|---|
| Dog | 8 April, 1951 | Pacific Proving Ground | 70 kilotons | |
| Easy | 21 April, 1951 | Pacific Proving Ground | 47 kilotons | |
| George | 9 May, 1951 | Pacific Proving Ground | 225 kilotons | |
| Item | 25 May, 1951 | Pacific Proving Ground | 45.5 kilotons |