Space Shuttle
An image taken from NASA video shows a spacewalker Christer Fuglesang holding an old amonia tank outside the International Space Station during a spacewalk of the STS-128 mission Thursday, Sept. 3, 2009. (AP Photo/NASA TV)
An image taken from NASA video shows a spacewalker Christer Fuglesang holding an old amonia tank outside the International Space Station during a spacewalk of the STS-128 mission Thursday, Sept. 3, 2009. (AP Photo/NASA TV)