Aug. 29, two hours before lift off, during the countdown NASA found a temperature issue with one of the four RS-25 engines that prevented teams from continuing with the mission. More information about the next attempt is expected Tuesday evening from NASA.

NASA moved the time line for the SLS’s third roll out up by over a day. After a slight delay due to lightning in the area SLS began to roll from the VAB at 10:00 pm E.T. on August 16th. Now it will reside on Launch Complex 39B until it lifts off for the first time on a journey around the moon, going further and longer than any human rated spacecraft has gone before.