Download coordinates as: Operation Redwing was a United States series of 17 nuclear test detonations from May to July 1956.

They were conducted at Bikini and Enewetak atolls by Joint Task Force 7 (JTF7).

Redwing demonstrated the first United States airdrop of a deliverable hydrogen bomb during test Cherokee.

Because the yields for many tests at Operation Castle in 1954 were dramatically higher than predictions, Redwing was conducted using an "energy budget": There were limits to the total amount of energy released, and the amount of fission yield was also strictly controlled.

Fission, primarily "fast" fission of the natural uranium tamper surrounding the fusion capsule, greatly increases the yield of thermonuclear devices, and constitutes the great majority of the fallout, as nuclear fusion is a relatively clean reaction.