Timelapse video: The final space shuttle assembled for flight

A last-of-its-kind piece of space hardware — the only remaining shuttle external fuel tank — makes its way along the city streets of Los Angeles to the California Science Center.

VIDEO: By the light of a waning moon, the space shuttle Atlantis returned to Earth on July 21, dropping out of predawn darkness to close out NASA’s 135th and final shuttle voyage, a long-awaited – and long-dreaded – milestone marking the end of an era for American manned space flight. (Membership Required)

The crew of Space Shuttle mission STS 41-B provide an overview of their mission. Challenger launched from the Kennedy Space Center on February 3, 1984, and although the flight was marred by the failure of two commercial satellite deployments, astronaut Bruce McCandless made history by making the first untethered spacewalk using the Manned Maneuvering Unit jet pack.