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Operation Hardtack I
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Operation Hardtack I was a series of 35 nuclear tests conducted by the United States from April 28 to August 18, 1958, at the Pacific Proving Grounds. At the time of testing, the Operation Hardtack I
Aerial shot of the explosion during Hardtack I Poplar. Martin RB-57D in the foreground.
Aerial shot of the explosion during Hardtack I Poplar. Martin RB-57D in the foreground.
Operation Hardtack I Cactus shot Crater on Runit Island
Operation Hardtack I Cactus shot Crater on Runit Island
The Umbrella blast on June 9 with the SS Michael Moran in front.
The Umbrella blast on June 9 with the SS Michael Moran in front.
Runit Island
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Runit Island is one of forty islands of the Enewetak Atoll of the Marshall Islands in the Pacific Ocean. The island is the site of a radioactive waste repository left by the United States after it con
Operation Hardtack I
…detonated at 0615 on May 12, 1958, 25 minutes after FIR had been detonated at Enewetak. BUTTERNUT was detonated on a barge 4,000 feet (1.22 km) west of Runit, producing a yield range of 81 kilotons of TNT (340 TJ). The cloud rose to 35,000 feet (11 km), stabilizing at 30,000 feet (9.1 km). The DOD-sponsored…
Aerial view of the Runit Dome. The dome is placed in the crater created by the "Cactus" nuclear weapons test in 1958.
Aerial view of the Runit Dome. The dome is placed in the crater created by the "Cactus" nuclear weapons test in 1958.
In 1952, the United States dropped the nuclear bomb Ivy King 610 m (2,000 feet) north of Runit Island.
In 1952, the United States dropped the nuclear bomb Ivy King 610 m (2,000 feet) north of Runit Island.