Space shuttle readied as rescue ship

The space shuttle Endeavour rolled out to a Florida launching pad early Friday to serve as a rescue craft for its sister ship Atlantis in what is expected to be the last time in history that NASA has two orbiters in launch position at the same time. Riding atop NASA's Apollo-era crawler carrier vehicle, Endeavour completed the 4.2-mile (5.6-kilometer) trek to the seaside Launch Complex 39B at the Kennedy Space Center in Florida, at about 7 a.m. ET after a nearly eight-hour journey from the massive Vehicle Assembly Building. More

(Source: MSNBC - Sep 20)