How many U-2 spy planes were built?

The Lockheed U-2 'Dragon Lady' spy plane is famously one of the oldest aircraft types in service with theUnited States Air Force. The aircraft is a relic of the Cold War and first entered service in ...
Aviation Week

Lockheed Martin U-2

The U-2 is a single-engine, high-altitude reconnaissance aircraft. Development began in 1954, and a prototype flew the following year. Lockheed built 49 aircraft in the initial configuration, but as ...
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This is how pilots bring the Lockheed U-2 back to the runway

The Lockheed U-2 operates at extreme altitudes, which creates unique challenges when returning to Earth. Its long wings and narrow landing margins make conventional approaches impractical. Instead, ...