The space shuttle Atlantis touched down at NASA’s Kennedy Space Center on Friday completing an 11-day mission to upgrade the International Space Station. During their time in orbit, the seven shuttle astronauts completed 4 spacewalks and installed over $1 billion in equipment, including a 13.5 ton metal beam which will serve as the backbone for future modules on the station. Astronaut Jerry Ross made history with this flight, becoming the first person to go into space seven times.
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