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

S133-E-007873 (1 March 2011) --- NASA astronaut Scott Kelly, Expedition 26 commander, is pictured in the newly-installed Permanent Multipurpose Module (PMM) of the International Space Station while space shuttle Discovery (STS-133) remains docked with the station. Photo credit: NASA or National Aeronautics and Space Administration