Kiem Do, a colonel in the South Vietnamese Navy, remembers the solemn flag-lowering ceremony aboard the U.S.S. Kirk after the fall of Saigon.
With so many South Vietnamese helicopters landing on the USS Kirk, the crew had no choice but to push the helicopters overboard once they'd unloaded their passengers.
Watch Last Days in Vietnam with Vietnamese subtitles.
After the shelling of Tan Son Nhut Airport by North Vietnamese troops, the U.S. Ambassador was left with only one evacuation option—a helicopter evacuation.