NASA decided to suspend space shuttle flights after analyzing the launch of mission STS-114.
STS-114 was the first space shuttle mission since the destruction of the Columbia space shuttle in 2003. While the launch of STS-114 seemed to go smoothly at first, video records of the launch were analyzed, and pieces of debris were discovered falling off the shuttle. NASA decided to suspend all shuttle missions again, this time for a year until all kinks could be worked out.