 Monocoupe 110 Special "Little Butch," late 1940s. |
 Grumman G-22 Gulfhawk II, left, and Bücker Bü-133 Jungmeister, 1930s and 1940s. |
 Early aircraft. |
 World War I and other early aircraft. |
 The Hawker Hurricane Mk. IIc played a key role during the Battle of Britain, 1940, World War II. |
 Lockheed P-38J Lightning, World War II. |
 Republic P-47D Thunderbolt, World War II. |
 North American P-51C Mustang, World War II. This Mustang set many records after the war. |
 World War II. |
 Toward the end of World War II, a B-29 Superfortress ... |
 ... the Enola Gay ... |
 ... delivered the first nuclear weapon used in combat. |
 It dropped an atomic bomb on Hiroshima, Japan, on Aug. 6, 1945. |
 Three days later, another B-29 named "Bockscar" ... |
 ... dropped a second atomic bomb, on Nagasaki, Japan. |
 By Aug. 14, 1945, the Japanese surrendered to the Allied powers. |
 The two atomic bombs killed about 200,000 Japanese. |
 But by shortening the war and averting land battles in Japan ... |
 ... the bombs may have "saved" more than a million Japanese and American lives, historians say. |
 German aircraft from World War II. |
 Curtiss P-40, World War II. |
 Vietnam War aircraft. |
 McDonnell F-4S-44 Phantom II. |
 Russian MiG-21. |
 Russian MiG-21. |
 Vietnam War aircraft. |
 21st century Lockheed Martin X-35B Joint Strike Fighter. |
 Cruise missiles. |
 The Lockheed SR-71 Blackbird ... |
 ... continues to hold the distinction of being the world's fastest jet aircraft. |
 No reconnaissance aircraft has operated ... |
 ... in more hostile airspace or with such impunity. |
 The Blackbird was at the pinnacle of aviation technology during the Cold War. |
 It was designed to fly deep into hostile territory ... |
 ... and to avoid interception with its speed and high altitude. |
 This ultimate spy plane could fly at Mach 3.3 more than 85,000 feet above Earth. |
 On March 6, 1990, the career of this SR-71A Blackbird ended with a record-setting flight. |
 It flew from L.A. to Washington in 1 hour, 4 minutes, and 20 seconds, averaging 2,124 mph. |
 At the flight's conclusion, the plane landed at Dulles International Airport ... |
 ... and taxied into the custody of the Smithsonian's National Air and Space Museum. |
 Here's another look at this once super-secret plane. |
 And here's the plane's tail. |
 The Boeing 307 was the first airliner with a pressurized fuselage. |
 Also known as the Stratoliner, the Boeing 307 was first flown in 1938. |
 The Dash 80, bottom, was the prototype of the Boeing 707, America's first jet airliner. |
 The Concorde was the only supersonic jetliner ... |
 ... that ever went into commercial service. |
 Air France donated this particular plane ... |
 ... which was the first of its five Concordes. |
 British Airways owned a similar number. |
 The Concorde cruised at about 1,350 mph, more than twice the speed of sound. |
 Traveling at more than double the speed of a 747 ... |
 ... it crossed the Atlantic in about three and a half hours. |
 Air France began its supersonic service in January 1976 ... |
 ... and ended it on June 12, 2003, with the delivery of this plane to the Smithsonian. |
 Enterprise, the first space shuttle. |