Where else in the space of a few hundred square yards could you find the oldest Boeing airplane flying, a 1945 Grumman Widgeon amphibian, a 1956 de Havilland Chipmunk, and a 1929 Hamilton metalplaneall beautifully restored to flying condition? Only at the National Aviation Heritage Invitational at the Reno air races. Here's a preview video of the treasures that will be competing at Reno this year for the title of most accurately restored vintage aircraft. Video: LiveAirshowTV (6:59)