for the second time in a week, nasa has called off its attempt to launch a powerful rocket part of a mission aimed at eventually putting humans back on the moon. the artemis rocket was due to blast off in the past hour but technical problems forced the team to call for another postponement. here s nasa s administrator bill neilson. the mission management team is meeting this afternoon. they re going to look at it. they re going to see is there still a possibility now or are they going to have to roll back into the vehicle assembly building? if they decide that s the case, then it ll be an october launch. and october, i would say, although the window opens in early, i suspect it ll be more like the middle, because remember the first week of october, we ve got another crew. it s an international crew, two international participants on the crew of four that are going to the international space station. our science correspondentjonathan amos is at the kennedy space center. we