9Since its emergence at the dawn of the 20th century, powered flight has profoundly affected the way the world operates. The 25 Most Influential Aircraft of All Time showcases the greatest aircraft ever built and flown. Included are: Wright Flyer, Spirit of Saint Louis, Bell X-1, Douglas DC-3, Boeing 707, Learjet, Mitsubishi Zero, Supermarine Spitfire, Boeing B-17 Flying Fortress, P-38 Lightning, P-51 Mustang, Messerschmitt Me 262, and Piper Cub, to name only a few.