Atomic bomb test "Baker" at Bikini Atoll, Micronesian Islands in the Pacific Ocean during Operation Crossroads in July 1946. Aerial view of ships at anchor, grouped in a small area. Broken clouds in sky. Underwater explosion of bomb "Helen of Bikini", shot Baker, occurs as it throws a shock wave. It forms a huge round white cloud, grey smoke curls up its center. Lower clouds around the area dissipates. Nuclear test mushroom cloud hangs over the ships. A large trunk of the bomb blast extends down into the water. Many ships surround the blast area.