He was a B-17 navigator during WW2 for 32 missions. After the war, he left the military and went to college. After that he rejoined to become a fighter pilot (what he wanted originally anyway). He flew P-51s, and later transitioned to jet fighters. Flew combat in the Korean War, mostly ground attack missions.

I would have joined the Air Force too, but with my thick glasses the AF told me no way I would be a pilot. So I wound up as a compiler nerd instead :-)

That's amazing. My grandfather flew for Pan Am during the war, and his flight career spanned biplanes to the 707. I'm in awe of that generation. Your dad sounds like he had a similar adventure!

Yup, he learned to fly in stringbag biplanes. An era that will never come again. My father had a long and very full life. Sounds like your grandfather did, too!