The Lockheed U-2, nicknamed "Dragon Lady", is a single-jet engine, ultra-high altitude reconnaissance aircraft operated by the United States Air Force (USAF) and previously flown by the Central Intelligence Agency (CIA). It provides day and night, very high-altitude (70?000?feet/21?000?m), all-weather intelligence gathering.The U-2 has also been used for electronic sensor research, satellite calibration, and communications purposes.Early versions of the U-2 were involved in several events through the Cold War, being flown over the Soviet Union, China, Vietnam, and Cuba. In 1960 Gary Powers was shot down in a CIA U-2A over the Soviet Union by a surface-to-air missile. Another U-2, piloted by Major Rudolf Anderson, Jr., was lost in a similar fashion in the Cuban Missile Crisis of 1962.