Engineering film footage of the final shuttle launch

Thirty years after the space shuttle Challenger disintegrated in the clear, cold sky high above Cape Canaveral, the commander’s widow no longer feels anger at NASA and the management missteps and schedule pressure that kept the orbiters flying despite a fatal flaw in their solid-fuel boosters.

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)

A spectacle never seen before — a space shuttle external fuel tank traversing city streets — was witnessed in Los Angeles on Saturday as the relic was moved to the museum that will construct a rocket science attraction.