Cue Independence Day music. On a similar note, have you guys seen the History Channel's Secret * Aircraft of WWII series? They have some nifty bits about flying wings, among others, especially the Horten Ho XVIII that could've reached NYC in 1946. (name blocked) has some torrents up if you have membership.
It was Jack Northrop, actually. The Northrop company didn't buy Grumman until 1994.
This photo was an accident. The President asked the test pilot to "fly right down Pennsylvania Avenue" The problem was that from the air Washington looks like a damn forest. The only reference point the pilot could find was the capitol building and there just happened to be someone standing there with a camera at that moment.