NASA and contractors knew the possibility of any one of a thousand things going wrong. This shuttle was delayed for a couple of years while they supposedly worked these things out and played a game of "what if" with all the components that make up the shuttle. What have they been doing for the past two years and WHERE WAS THE QUALITY CONTROL?
We should all meditate and send them angel power for a safe trip back to earth. The whole NASA sloppiness really pi**es me off... and I don't think its the whole institution, but a few key people in charge, probably with big egos.