STS-133 and Expedition 26 crew enter PMM (Permanent Multipurpose Module)

S133-E-007875 (1 March 2011) --- NASA astronaut Steve Lindsey, STS-133 commander, is pictured in the newly-installed Permanent Multipurpose Module (PMM) of the International Space Station while space shuttle Discovery remains docked with the station. Photo credit: NASA or National Aeronautics and Space Administration