UFO : NASA Photographed UFO During Space Shuttle Mission STS 121

STS-121 was a space shuttle mission to the International Space Station (ISS) flown by Space Shuttle Discovery. 



The main purposes of the mission were to test new safety and repair techniques introduced following the Columbia disaster of February 2003 as well as to deliver supplies, equipment and European Space Agency (ESA) astronaut Thomas Reiter from Germany to the ISS.


After two