NASA scrambles to avoid another space shuttle loss.

As the clock ticks toward the critical Mars launch window, NASA scrambles to fix a space mistake.

Despite multiple pressures, a shocking discovery causes NASA to cancel a historic launch.

A spacecraft free-falls from orbit and smashes into the ground when its parachute fails to deploy.

A harrowing space mistake leaves the solid rocket boosters hanging by a thread.

The loss of Space Shuttle Columbia stands as one of the worst disasters in spaceflight history.