NASA Photography

The mission included both joint and separate scientific experiments, and provided useful engineering experience for future joint US–Russian space flights, such as the Shuttle–Mir Program and the International Space Station.
- Space Shuttle program (1981–2011)
The Space Shuttle became the major focus of NASA in the late 1970s and the 1980s. Planned as a frequently launchable and mostly reusable vehicle, four space shuttle orbiters were built by 1985. The first to launch, Columbia, did so on April 12, 1981, the 20th anniversary of the first space flight by Yuri Gagarin.
Its major components were a rocket plane orbiter with an external fuel tank and two solid fuel launch rockets at its side. The external tank, which was bigger than the spacecraft itself, was the only component that was not reused. The shuttle could orbit in altitudes of 185 – 643 km (115 – 400 miles) and carry a maximum payload (to low orbit) of 24,400 kg (54,000 lb). Missions could last from 5 to 17 days and crews could be from 2 to 8 astronauts.