Now that tje crew of space shuttle Discovery is back in Houston after a few days of launch training and a practice countdown, a two-day flight readiness review is on tap.

Astronauts of the space shuttle Discovery go through the countdownas they prepare for their end-of-the-month mission. The dress rehearsal is an important test for the crew as it prepares to head into space.

NASA said it plans to extend space shuttle Discovery's mission by a day.

NASA is giving us an early peek into the space program with the release of newly restored video taken decades ago -- including the first space walk.