S133-E-008564 (4 March 2011) --- It's another moving day onboard the International Space Station, as NASA astronaut Steve Lindsey, STS-133 commander, participates in the team effort of 12 total astronauts and cosmonauts working together temporarily onboard the orbital outpost. The joint crews added the Permanent Multipurpose Module (PMM) to the station earlier in the week. Photo credit: NASA or National Aeronautics and Space Administration