From a New York Times obit by Sam Roberts headlined “Brian Shul Dies at 75; Fighter Pilot who Flew World’s Fastest Plane”:

Brian Shul, a retired Air Force major who modestly described himself as “a survivor” rather than a hero, after he was downed in a Vietnamese jungle, where he nearly died before rebounding to pilot the world’s fastest spy plane, died in Reno, Nev.

The cause of his death, in a hospital, was cardiac arrest, said his sister and sole survivor, Maureen Shul, a former mayor of Castle Pines, Colo. He had collapsed as he finished regaling the annual gala of the Nevada Military Support Alliance with his aerial adventures.