The Lockheed U-2, nicknamed “Dragon Lady”, is an American 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, 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, scientific research, and communications purposes.
Source: Lockheed U-2 on Wikipedia
More info:
The Lockheed U-2 is a high-altitude reconnaissance aircraft that was developed by the United States in the 1950s. The U-2 was designed to fly at altitudes above 70,000 feet (21,000 meters), beyond the reach of most Soviet air defenses at the time. The U-2 was used to conduct covert surveillance missions over the Soviet Union, China, Cuba, and other countries of interest during the Cold War. The U-2 was also involved in several notable incidents, such as the 1960 U-2 incident, when a U-2 piloted by Francis Gary Powers was shot down over the Soviet Union and captured, and the 1962 Cuban Missile Crisis, when U-2 photographs revealed the presence of Soviet missiles in Cuba.
The U-2 is still in service today, with upgrades and modifications to extend its lifespan and capabilities. The U-2 is operated by the United States Air Force and the Central Intelligence Agency, as well as by NASA for scientific research. The U-2 is one of the most challenging aircraft to fly, requiring special training and equipment for the pilots and ground crews. The U-2 is also one of the most valuable assets for intelligence gathering, providing high-resolution imagery and signals intelligence from around the world.