Space Shuttle Discovery back on Earth (8 images)

This NASA images taken on March 7, 2011 by a crew member onboard the International Space Station shows Space Shuttle Discovery after it undocked from the International Space Station. The crew of Discovery is in the final days of mission STS-133 and will attempt a return to Earth on March 9. UPI/NASA

This NASA images taken on March 7, 2011 by a crew member onboard the International Space Station shows Space Shuttle Discovery as it moves away from the International Space Station. The crew of Discovery is in the final days of mission STS-133 and will attempt a return to Earth on March 9. UPI/NASA

NASA's Space Shuttle "Discovery" touches down on Runway 15 at the Shuttle Landing Facility for an on time landing at 11:57 AM at the Kennedy Space Center on March 9, 2011. Discovery's 39th and final flight ends with the successful completion of a fourteen day mission, STS 133, to the International Space Station. Discovery and her crew delivered supplies, installed the Multipurpose Logistics Module and the Express Logistics Carrier #4, completing construction of the orbiting station. UPI/Joe Marino-Bill Cantrell

NASA's Space Shuttle "Discovery" approaches Runway 15 at the Shuttle Landing Facility for an on time landing at 11:57 AM at the Kennedy Space Center on March 9, 2011. Discovery's 39th and final flight ends with the successful completion of a fourteen day mission, STS 133, to the International Space Station. Discovery and her crew delivered supplies and installed the Multipurpose Logistics Module and the Express Logistics Carrier #4, completing construction of the orbiting station. UPI/Joe Marino-Bill Cantrell