The Grotto Book One: Phu Bai, Vietnam: 1969 - 1970The Grotto is the true story of Marine Aviators in Vietnam who flew CH 46 Sea Knight helicopters near the end of the first, and probably last, great helicopter war. This part of the war has seemingly been forgotten and barely written about. Marines who entered Vietnam during this era knew they would not be leaving as winners or be welcomed back home as victors. The polite political phrase "Vietnamization and Redeployment" the sole purpose of which was