NASA - National Aeronautics and Space Administration

S135-E-007441 (11 July 2011) --- NASA astronaut Doug Hurley, STS-135 pilot, moves around supplies and equipment in the Leonardo Permanent Multipurpose Module (PMM) during the fourth day of flight for Atlantis' four person crew. This module is a component that joined the International Space Station complex after it was flown into space aboard the space shuttle Discovery on STS-133. Photo credit: NASA

S135-E-007439 (11 July 2011) --- NASA astronaut Doug Hurley, STS-135 pilot, moves around supplies and equipment in the Leonardo Permanent Multipurpose Module (PMM) during the fourth day of flight for Atlantis' four person crew. This module is a component that joined the International Space Station complex after it was flown into space aboard the space shuttle Discovery on STS-133. Photo credit: NASA

S135-E-007437 (11 July 2011) --- NASA astronaut Doug Hurley, STS-135 pilot, moves around supplies and equipment in the Leonardo Permanent Multipurpose Module (PMM) during the fourth day of flight for Atlantis' four person crew. This module is a component that joined the International Space Station complex after it was flown into space aboard the space shuttle Discovery on STS-133. Photo credit: NASA

S135-E-007457 (11 July 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, is pictured on the flight deck of the space shuttle Atlantis during the mission's fourth day of activities in Earth orbit and second day while being docked with the International Space Station. Photo credit: NASA

S135-E-007426 (11 July 2011) --- NASA astronaut Chris Ferguson, STS-135 commander, floats through the Raffaello multi-purpose logistics module packed with supplies and spare parts for the International Space Station. Ferguson and his three crewmates carried the module in Atlantis' cargo bay on their trip to link up with the orbital outpost. Photo credit: NASA

S135-E-007420 (11 July 2011) --- NASA astronaut Sandy Magnus, STS-135 mission specialist, may well be thinking of the word "ocean" for two reasons. Her navigation in the weightlessness of space could be loosely compared to swimming, and she is surrounded by an "ocean" of supplies and equipment in the Raffaello multi-purpose logistics module. The supplies and spare parts are for use and consumption for the International Space Station and its crews. Raffaello was transported up to the station by Magnus and her three crewmates aboard the space shuttle Atlantis. Photo credit: NASA

S135-E-007411 (11 July 2011) --- NASA astronauts Sandy Magnus, STS-135 mission specialist, and Chris Ferguson, commander, compare notes in Node 2 or Harmony aboard the International Space Station. The orbital outpost and Atlantis have been docked for more than a day and will remain so for several more. Photo credit: NASA

S135-E-007410 (11 July 2011) --- NASA astronauts Sandy Magnus, STS-135 mission specialist, and Chris Ferguson, commander, compare notes in Node 2 or Harmony aboard the International Space Station. The orbital outpost and Atlantis have been docked for more than a day and will remain so for several more. Photo credit: NASA

S135-E-007351 (11 July 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, watches as astronaut Chris Ferguson (out of frame at right) toggles switches on the overhead panel of the forward flight deck of the space shuttle Atlantis. The action came during the mission's fourth day of activities in Earth orbit and second day while being docked with the International Space Station. Photo credit: NASA

S135-E-007353 (11 July 2011) --- NASA astronauts Rex Walheim (left), STS-135 mission specialist, and Chris Ferguson are pictured on the forward flight deck the space shuttle Atlantis. The photo was taken during the mission's fourth day of activities in Earth orbit and second day while being docked with the International Space Station. Photo credit: NASA