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

S133-E-007893 (1 March 2011) --- NASA astronaut Steve Lindsey (left), STS-133 commander; and Russian cosmonaut Dmitry Kondratyev, Expedition 26 flight engineer, are 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