You have to read what they actually wrote or listen to the press-conference, instead of the reporter's 'distillation' of it. Basically, they said that NASA hadn't met the CAIB requirements because they <b>couldn't</b> meet them. The CAIB report required them to develop tile/RCC repair techniques before they flew the Shuttle, but there's no way to test them in the actual space environment without flying the Shuttle. And so on, the CIAB report set an impossibly high bar - but it was done deliberately.<p>As one poster's sig line says "Aim high. You might miss the target, but at least you don't shoot yourself in the foot." NASA has made enough progress towards the CAIB goals that even though they haven't met them 100%, the vehicle is safer to fly now than it was in 2002.<p>More importantly, they said that additional time on the ground wasn't going to improve anything. The only way to test, the only way to certify, the only way to prove that the improvements work is to fly.</p></p>