T-4 Minutes and Counting

The InSight countdown is underway, proceeding toward a liftoff at 7:05 a.m. EDT (4:05 a.m. PDT). During the last four minutes of the countdown, the Atlas and Centaur propellant tanks will be brought up to flight pressure, the rocket and spacecraft will be confirmed on internal power, and the Western Range and launch managers will perform final status checks. A computerized autosequencer will take over the countdown in order to conduct a host of activities in precise order.