The launch of a United Launch Alliance (ULA) Delta IV Heavy rocket carrying the NROL-44 mission for the National Reconnaissance Office is planned for Sept. 26, 2020.

The launch period is 12:01-1:35 a.m. EDT.

The team has reviewed all data and ground support equipment and determined that a ground system regulator internal component failure was the cause of the on-pad abort.

Out of an abundance of caution all three regulators associated with each of the three common booster cores are being replaced and retested.

Heather McFarland- photo Scott Schilke