Thanks, for that info. I was told the story by a mutual friend of Major Pless's and Major Horace Higley “Buddy” Fleming III , USMC, KIA Vietnam at the home of Major Fleming's parents in Pensacola in late 1975 or early 1976.
Major Fleming was a 1st LT or Captain at the time of his death, and was listed as MIA for several years.
As I remember, all three were in flight school together at Pensacola where Major Fleming was raised.
Major Fleming's death was a tragedy, too. Here's the account of his death: "Compiled from one or more of the following: raw data from U.S. Government agency sources, correspondence with POW/MIA families, published sources, interviews. Updated by the P.O.W. NETWORK in 2020."
FOLLOWING WEB SITE FOR COMPLETE STORY OF ACTION LEADING TO DEATH/MISSING IN ACTION:
After reading your "Source" in post #9, I see that Major Pless attended flight school in 1959-1960, so it would have been impossible for Pless, Fleming and the third guy to have been in flight school together.
It was a long time ago, and apparently I am not remembering the whole story, including the part about Pless trying to "jump the draw bridge."