
Two Kansans on Knife 13 were among the last casualties of Vietnam. They died on a rescue mission.
When did the Vietnam War end? For Gregory Hankamer and Robert Weldon it came at 9:30 p.m. Tuesday, May 13, 1975, on a CH-53 helicopter with the call sign Knife 13. The helicopter was part of a massive and hastily organized effort to rescue the crew of the …