"The challenge
right now is closure of an awful lot of paper. The vehicle can't
launch until all the paperwork is done. I know that sounds a little
bit trivial, but documentation of each and every thing we do is
very important."
Source: NASA's Associate
Administrator for Space Operations, Bill Readdy, commenting to
reporters on what's left to do before Discovery launches into space
on May 15, the first time the Space Shuttle will fly after the
Columbia disaster in 2003.