I could have sworn that there was a Major General somewhere up in my chain of command a while back who had one of these astronaut badges in his alphas picture, unless I was just smoking crack. Do aviators stay on active duty while serving with NASA and then come back to the fleet ever? It seems to me that John Glen came back from Korea as a Major and was famous doing those game shows and whatnot but then did NASA and retired as a Lt. Col., unless of course I am just smoking too much crack. See below link:
http://en.wikipedia.org/wiki/Astronaut_Wings
http://en.wikipedia.org/wiki/Astronaut_Wings