This DVD details the military effects studies performed during the operation Castle testing. It covers in great detail the weapons used, the blasts and their effects and much more about the purpose of this round of weapon testing.

This DVD has a run time of 39 minutes.

Operation Castle was a six-detonation test series held at the Atomic Energy Commission's (AEC) Pacific Proving Ground in the Spring of 1954. This test series, principally conducted at the Enewetak and Bikini Atolls in the northwestern Marshall Islands, provided proof tests of large-yield thermonuclear, or hydrogen, devices. Castle represented the end of a drive for a workable thermonuclear weapon and the beginning of the refinement of large-H-bombs into smaller and more efficient weapons.

After Castle, the U.S. could choose in a range of small tactical weapons to large strategic weapons. From this point, weapons development programs concentrated on producing bombs of specific nuclear weapons effects -- heat, blast, and radiation. The Bravo event of the Castle series yielded 15 megatons, the most ever exploded in atmospheric testing by the U.S. A scientific miscalculation caused the yield to be about double what was expected. Also, reports indicate that Bravo was the single worst incident of fallout exposure in all of the U.S. atmospheric testing program. Fallout was scattered over more than 7,000 square miles of ocean and islands, resulting in the contamination and exposure of military, civilian U.S. personnel working on the shot, and people of the islands who were earlier moved to a supposedly "safe" island but received large amounts of radiation. Acute radiation effects were observed among some of these people.

The shots in the Castle series were:

Bravo, February 28, Bikini, 15 megatons
Romeo, March 26, Bikini, 11 megatons
Koon, April 6, Bikini, 110 kilotons
Union, April 25, Bikini, 6.9 megatons
Yankee, May 4, Bikini, 13.5 megatons
Nectar, May 13, Enewetak, 1.69 megatons

Here are some sample clips from the DVD

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