A U.S. Marine Corps Sikorsky CH-53 <i>Sea Stallion</i> approach a landing zone in Saigon, Vietnam, 29 April 1975.
USMC
1975-04-29
Official U.S. Marine Corps photograph in: <i>U.S. Marines in Vietnam. The War that Would not End 1973-1975</i> <a rel="nofollow" class="external text" href="http://www.marines.mil/Portals/59/Publications/U.S.%20Marines%20in%20Vietnam%20The%20war%20that%20would%20not%20end%201971-1973%20PCN%2019000311200_9.pdf">(part 9)</a>, p. 189.