At T-4 minutes, the countdown has paused for a planned hold lasting half-an-hour. Everything is on pace for a liftoff at 11:05 p.m. EDT, including the weather and tonight’s tanking process loading fuel and oxidizers into the two stages of the Atlas V rocket. The team will receive the final launch weather forecast from the Air Force’s 45th Space Wing. Then launch teams for NASA, Orbital ATK , and United Launch Alliance will conduct their final polls ahead of the liftoff.