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

S133-E-007911 (1 March 2011) --- NASA astronaut Alvin Drew, STS-133 mission specialist, 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