"The US space agency Nasa has said it is grounding the space shuttle fleet while engineers investigate debris which fell from Discovery during its launch...
Shuttle programme manager Bill Parsons said the debris did not hit the orbiter and posed no threat to the crew...
But he said shuttles would not be able to fly again until the hazard was dealt with."
Um... you are grounding the shuttle fleet but the Discovery is OK?
http://news.bbc.co.uk/2/hi/science/nature/4723109.stm