Museums compete for space shuttles

The space shuttle Discovery is pictured after it undocked from the International Space Station, in this photograph taken more than 200 miles above Earth and released on March 9, 2011. [Photo/Agencies]

The space shuttle Discovery is seen framed by a window aboard the International Space Station after the undocking of the two spacecraft in this photo provided by NASA and taken March 7, 2011. [Photo/Agencies]