Grumman F6F Hellcat landing on a runway during Operation Crossroads, Bikini Atoll, Marshall Islands, 1946

On an airstrip in the Bikini Atoll, a Grumman F6F Hellcat is seen landing on a runway following an atomic test during Operation Crossroads. A man uses a geiger counter to test radiation levels on the airplane, Marshall Islands, 1946.Operation Crossroads was a pair of nuclear weapon tests conducted by the United States at Bikini Atoll in mid-1946. They were the first nuclear weapon tests since Trinity on July 16, 1945, and the first detonations of nuclear devices since the atomic bombing of Nagasaki on August 9, 1945.