Here’s the photo of an Aardvark I promised to post for a commenter on a blog. The two “retired” colonels in the photo have flown the F-111 or FB-111. The one on the right as a test pilot testing terrain following radar (NASA aircraft shown on my website) and the other as an FB-111 navigator. Hey, they both still fit into their flight suits! A good description of the aircraft/its history and generations can be found on Wikipedia.