Photos: Notable moments of the International Space Station The crew of the space shuttle Atlantis took this picture of the International Space Station after leaving it in July 2011. Atlantis was the last shuttle to visit the station, which was first launched in 1998 and built by a partnership of 16 nations. Hide Caption 1 of 13

Photos: Notable moments of the International Space Station The crew of the space shuttle Endeavour initiates the station's first assembly sequence in 1998. The International Space Station includes several large modules, each launched separately and connected in space by astronauts. Hide Caption 2 of 13

Photos: Notable moments of the International Space Station The Zarya control module, on the left with the solar panels, floats above Earth with its newly attached Unity module after the first assembly sequence in December 1998. Hide Caption 3 of 13

Photos: Notable moments of the International Space Station The first crew of the International Space Station, seen on board in December 2000. From the left are cosmonaut Yuri P. Gidzenko, astronaut William M. Shepherd and cosmonaut Sergei K. Krikalev. Hide Caption 4 of 13

Photos: Notable moments of the International Space Station The Endeavour crew installs the first set of U.S. solar arrays on the station in 2000. Hide Caption 5 of 13

Photos: Notable moments of the International Space Station In March 2001, a space shuttle delivered the station's second crew and brought the first one home. It also brought Leonardo, the station's first Multi-Purpose Logistics Module, to the station. Leonardo carried supplies and equipment. Hide Caption 6 of 13

Photos: Notable moments of the International Space Station In September 2006, the space shuttle Atlantis docked with the space station, delivering solar wings and a new truss. Hide Caption 7 of 13

Photos: Notable moments of the International Space Station The space shuttle Discovery leaves the space station in March 2008 after its crew successfully delivered and installed the Japanese-built Kibo lab. Hide Caption 8 of 13

Photos: Notable moments of the International Space Station The unmanned SpaceX Dragon spacecraft connects to the space station in May 2012. It was the first private spacecraft to successfully reach an orbiting space station. Hide Caption 9 of 13

Photos: Notable moments of the International Space Station An unmanned Russian cargo craft disconnects from the space station in April 2013. The station relies heavily on ships to bring up supplies. Hide Caption 10 of 13

Photos: Notable moments of the International Space Station Commander Koichi Wakata of the Japan Aerospace Exploration Agency peers out of the space station's Cupola observatory on April 27. The Cupola is a dome-shaped module that allows station crew members to observe and guide activities outside the station. Hide Caption 11 of 13

Photos: Notable moments of the International Space Station A Russian Soyuz spacecraft is docked with the space station on May 5. Since the U.S. shuttle program ended in 2011, all crew members are ferried to and from the space station on Russian rockets. Hide Caption 12 of 13