The last act of the U.S. Military in Vietnam was a helicopter evacuation called "Operation Frequent Wind" that evacuated thousands of U.S and South Vietnamese citizens.
On Wednesday, a Marine Sergeant Major, Michael Zacker, was a crewmen on one of the last helicopters to lift off, said he sometimes meets some of those he helped rescue.
"Sometimes we break into a little Vietnamese, but not much because I don't know much. We talk and we hug and we remember what was lost," he said.
The last helicopter to leave the U.S. Embassy that day is on display at the Flying Leathernecks Aviation Museum at Miramar.