On This Day June 1, 2011:  Final Touchdown

Space Shuttle Endeavour's

On June 1, 2011, NASA's space

 shuttle Endeavor touched down safely for the final time at the Kennedy Space Center in Florida

Endeavour was built as a

replacement for the shuttle Challenger, which was lost in the 1986 accident that also killed its seven-astronaut crew.

Congress authorized

 the construction of Endeavour in 1987, and the orbiter first blasted off in 1992.

Its final launch

 occurred on May 16, 2011, sending a six-member crew into orbit on NASA's STS-134 mission.

This last mission delivered

 the Express Logistics Carrier-3 and the $1.1 billion Alpha Magnetic Spectrometer to the International Space Station.

Endeavour had many successful

missions during its run, one of the most famous being the start of construction on the ISS.

SpaceX Brings 4  Midnight Splashdown

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