Crossroads Able is the first postwar nuclear weapon test.

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. The purpose of the tests was to investigate the effect of nuclear weapons on warships.

July 1 is the 182nd day of the year in the Gregorian calendar; 183 days remain until the end of the year.