Fisheries Training Institute cruised the itarshall Island area for survey purposes; this was fcllowed by a U.S. cruise en the Coast Guard Cutter . Roger B. Taney under the name Cperation tron Jl Operation Castle continued with other tests at Bikini Atoll, but with an enlarged exclusion of the eccanic areas of possible fallout. The enly detonation of Operation Castle made in Enivetok Atoll] was the Nectar shot, detonated on 14 fay 1954 on a barge in the lagoon over the Mike crater. By 1954 the large island of Engebi (Janet in the U.S. code name) had become a barren, sandy island from which the coconut palms and other trees had long since disappeared. This major island of 291 acres had been subjected to World War II bombardment and, by 1954, to four series of nuclear weapons tests. The nuclear explosions produced blast and irradiated the island by. initial radiation from nuclear detonations and by residual radiation of fallout. Nevertheless, colonies of rats continued to thrive on this isolated island in ny T955—— even though casualties resulted from the tests. The 1956 series of tests in the Pacific Proving Ground was called Operation Redwing. These took place at both Bikini and Eniwetok Atolls, with eleven at Eniwetok Atoll. Part of Bokou Island (Irene in the U.S. code name) was removed on 6 June 1956 by test Seminole, which was positioned on the land Surface. This Seminole crater is on the east side of the remainder of Bokou Island. The other surface test in Operation Redwing was Test Lacrosse, which formed a crater at the Northern tip of Runit Island (Yvonne is the U.S. code name) in the tide lands on the ocean side of the island. dohn H. Harley, "Operation Troll," AEC report NY0-4656 (1956). Reference 1, p 207. U4 11. 12.