An interesting aircraft documentary about Russian air force military aircraft that some believe are the worst nightmare of the us air force. The Russian Air Force .br US Air force tests WORLDS FASTEST AIRCRAFT ON RECORD the X-43A Hypersonic aircraft worst nightmare for the Russian air force. The X-43 was an .br An interesting aircraft documentary about Russian air force military aircraft that some believe are the worst nightmare of the us air force. The Russian Air Force .br An interesting aircraft documentary about Russian air force military aircraft that some believe are the worst nightmare of the us air force. The Russian Air Force .