Earthlings gather at the Indian River in Titusville, Florida on February 24, 2011 to witness the final launch of the space shuttle Discovery. Discovery, the first spacecraft in the shuttle fleet to be retired has flown 39 missions, more missions than any other shuttle. For this mission, STS-133, Discovery is carrying the Leonardo Permanent Multipurpose Module, or PMM, to the International Space Station. The PMM is loaded with supplies, experiments, equipment and a humanoid robot assistant for the station. The Robotic astronaut is called Robonaut 2 and is the first robot of its kind to fly into and work in space. The six human astronauts on STS-133 include Mission Commander Steve Lindsey, Pilot Eric Boe, and Mission Specialists Alvin Drew, Steve Bowen, Michael Barratt and Nicole Stott.