Swarms are at the Kennedy Space Center Visitor Complex to watch Discovery lift off on its mission from Launch Pad 39A.

Swarms of people are at the Kennedy Space Center Visitor Complex in Florida to watch space shuttle Discovery lift off on its final scheduled mission from Launch Pad 39A.

Liftoff is set for 4:50 p.m. EST on Feb. 24. Discovery and its six-member STS-133 crew will deliver the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the International Space Station. Discovery, which will fly its 39th mission, is scheduled to be retired following STS-133. This will be the 133rd Space Shuttle Program mission and the 35th shuttle voyage to the space station. For more information on the STS-133 mission, visit www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts133/. Photo credit: NASA/Jack Pfaller