Keywords: Troops leaving UH-1 copter.jpg en Troops leaving UH-1 copter 1971-09 http //www rucker army mil/avjournal/1970/1971/AVN_DIG_1971-09 pdf The Helicopter Hazardous At Any Height United States Army Aviation Digest September 1971 Vol 17 No 9 page 55 22px United States Navy United States Navy Lieutenant W H Baker Naval Weapons Laboratory Dahlgren Virginia PD-USGov-Military-Navy LicenseReview http //www rucker army mil/avjournal/1970/1971/AVN_DIG_1971-09 pdf The Helicopter Hazardous At Any Height United States Army Aviation Digest September 1971 Vol 17 No 9 page 55 Natuur12 2013-12-03 Bell UH-1 Iroquois |