NASA Launches at Certain Times, but What Are Their Main Concerns?

NASA is still trying to fix the leaky, quick disconnect. The other thing that they are looking at and might cause a problem is something called the flight termination system. It would detonate the whole rocket causing a massive firework in the sky rather than an uncontrolled lot of very explosive liquid hydrogen and oxygen heading towards the wrong place on earth. All of NASA's statements have kept referring to the current expiration date of this bit of kit.