Awesome video of the Lockheed U-2:
First flew in 1955, and entered service in 1957. Probably the most famous incident involving the plane was when Francis Gary Powers was shot down over the Soviet Union in 1960 by an SA-2 Surface-to-Air missile. Lesser known is a shootdown by the same missile over Cuba during the Cuban Missile Crisis. The CIA no longer operates the U-2, but the Air Force still does. They were intended to be largely replaced by the unmanned RQ-4 Global Hawk, but there’s talk of canceling that program due to costs. It seems it may be cheaper to extend the life of the U-2 another 20 years to 2023, at which point the U-2 program is pushing 70. It’ll be up there with the B-52 Stratofortress, which entered service about the same time, and could quite possibly end up seeing 100 years of service.