The U-2

The Lockheed U-2, nicknamed "Dragon Lady", is a single-engine, high-altitude aircraft flown by the United States Air Force and previously flown by the Central Intelligence Agency. It provides day and night, high-altitude (70,000 feet/21,000 metres), all-weather surveillance. The aircraft is also used for electronic sensor research and development, satellite calibration, and satellite data validation.

1. The CIA and the U-2 Program, 1954-1974 [269 Pages]