Discovery: A Look Back Before Her Last Flight

By Nancy Atkinson - February 22, 2011 at 4:01 PM UTC | Space Exploration

As preparations continue for the launch of space shuttle Discovery on STS-133, here's a look back at the history of the oldest orbiter still in service. When this flight is over, 180 people will have flown on Discovery and the orbiter will have traveled over 240 million kilometers (150 million miles).