UFO in epicenter of underwater nuclear explosion in 1958

Underwater nuclear explosion on the atoll Municipality of Enewetak (Marshall Islands) in the Pacific Ocean on May 16, 1958. The code name of test — Wahoo, a charge — a tactical nuclear bomb of the 9 kilotons Mark 7 at a depth of 150 m. The unknown object appears in a shot before the explosion and gets to its epicenter. In the history of this test under code designation of "Wahoo" there are no data on use of planes or Air UAVs started over explosion epicenter. Description of tests: May 16, 1958. In a second after explosion the dome which in seven seconds reached height was formed...