Ah, the Huey's, oh yes.
I was blessed by not only having the aforementioned USAF retired Lieutenant Colonel as a friend of our family, but also another retired USAF officer, Harrison, who flew the Huey's during the Vietnam War. Trouble was, although the former was more than happy to talk about his days flying fighters over Korea, then in B52's over Vietnam, with us even being taken once on a guided tour around the USAF Albuquerque Air Base, viewing at close hand a B52, the Huey pilot would NEVER talk about his experiences in 'Nam'. The Lt Col, Sam, always said that many of his fellow servicemen who fought in that war, close to, or on the ground, saw too much and became absolutely disgusted in their country's involvement, as did the normally very joyful and full of mischief, Harrison.
Obviously that last fact I knew only too well from a wealth of historic accounts of those Americans that were there, let alone from the media coverage