Ruhrstahl X-4 Air-to-Air Missile
Ruhrstahl X-4 Air-to-Air Missile on display in the WWII Gallery at the National Museum of the U.S. Air Force. This missile, like the V-weapons, is an example of advanced technology that failed to prevent German defeat in WWII, but previewed future arms development. (U.S. Air Force photo by Ken LaRock)