Nuclear weapons testing

Final touches are added to a cement pill box on one of the islands at Eniwetok.

Men coiling cable on the deck of an LSM prior to laying the cable underwater at Eniwetok Atoll.

Fireball rises from an atom bomb explosion during the tests at Eniwetok casting its reflection on the water.

The fireball of an atom bomb explosion emerges through cloud formations, forming into the already familiar mushroom, during the experimental tests at Eniwetok.

Burst of an atom bomb during the experimental tests at Eniwetok. Cloud formations give the impression of a sunset rather than a bomb blast.

A causeway being built between two of the islands in the Eniwetok Atoll as part of the preparation for the experimental tests of the atom bomb.

Civilian engineers working on the base of a tower from which an atom bomb was exploded during the experimental tests at Eniwetok in the spring of 1948.

Cement instrument testing cubes are build near the detonation point of an atom bomb. These cubes or "igloos" will hold recording instruments. The man is unidentified.

Atomic bomb explosion of one of the tests made at the Eniwetok Proving Grounds in the spring of 1948.

A dispersing atom cloud after one of the experimental tests at the Eniwetok Proving Grounds.