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SEA KNIGHT: A Boeing-Vertol CH-46 Sea Knight delivers supplies to a Marine base. Introduced in 1964, this helicopter wasn’t combat ready until 1968 after a series of modifications. The versatile “Phrog,” a nickname from its froglike shape, performed yeoman service for the Navy and Marines, including air assault, logistic support, medevac, and search and rescue. / USMC
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