Lockheed Martin's U-2 spy plane is perhaps the most successful surveillance aircraft ever built. First flown on August 4th, 1955, the covert high-flyer has remained in service for 60 years. It starred in a couple of major Cold War crises. In 1960, a U-2 pilot was shot down over the Soviet Union, and its pilot captured. In 1962, U-2 surveillance photography recorded Soviet missiles in Cuba, and another American U-2 pilot was shot down, this time fatally. Despite a tumultuous first decade, the plane has endured in the reconnaissance arsenal of the United States, even recently competing with the unmanned Global Hawk for missions. Now, it appears, Lockheed Martin is looking for a successor to the venerable spy plane. A new U-2, if you will.