==About his parents== 
 I think that it would be useful to at least list his parents' home towns. I saw a recent TV documentary that said that his grandmother who gave him his first guitar was a Texan. This might give a slight insight into where Denver's somewhat country & western influences in his music came from. There is just a hint of this in his songs like "Country Roads", etc.  

 Also, I made a few changes towards accuracy about his father's background. (I don't know anything about his mother. Someone else ought to provide more information about her. For example, is she still alive?) But someone blatently reverted it w/o paying any attention to the facts. So, I will beat it to death now. His father was a USAF pilot. Under USAF doctrine and policy, all of its pilots are qualified for flying all types of its airplanes, under whatever duties, including combat. (In other words, they say, "Every pilot is a fighter pilot.") So, to say that someone was a "pilot instructor" is inaccurate and somewhat insulting to Denver's father. Some pilots do pilot instructing, but they are qualified to fly fighters, bombers, transports, of all types. (Perhaps with additional training, but qualified, nevertheless.)  

 On the other hand, the US Navy and Marine Corps does it different. Their pilots split into two tracks in training. On is the track for fighters, bombers, S-3 Viking, etc., mostly for aircraft carriers. The other track is for large, multi-engine airplanes, such as the P-3 Orion and the C-130 Hercules, which are used from land bases and for missions like ocean patroling and transporting cargo and passengers.  

 The Navy also has a separate helicopter school for training pilots of those for ship-based operations, which is quite a bit different from land-based operations. The Navy not only has helicopters on aircraft carriers, but also on cruisers Ticonderoga-class, destroyers Arleigh Burke-class, and fast frigates Oliver Hazzard Perry-class. 

 The Air Force also sends some of its pilots to the US Army helicopter pilot school at Ft. Rucker, Alabama. They do this so that they can fly helicopters - almost entirely for the search-and-rescue missions that the Air Force needs. I knew one of these - one of my AFROTC instructors who had flown the Air Force "Jolly Green Giant" helicopters over Vietnam to rescue shot down and crashed aircrews. He had been a fixed-wing pilot before that. 

 So, to be a pilot instructor is a good thing, but Air Force pilots do ever so much more than that, and being an instructor pilot (the USAF terminology) is generally only a part of a pilot's career in either the USAF, the Navy, or the Marine Corps. So, being an instructor pilot is a small subset of being a pilot. Also, a "pilot instructor" can be someone who isn't really a pilot at all, but rather someone like an aeronautics expert who teaches aeronautics to pilots. Or electronics. Or survival skills. Or something else. Likewise, there are professors who teach medical students in fields like biochemistry, but they aren't medical doctors themselves. See Dr. Isaac Asimov, a biochemist who taught at the Boston University Medical School for a period of years, before becoming a full-time writer. So, he was a "doctor instructor" w/o being a medical doctor.