NASA astronaut Rex Walheim excited about Orion test flight

United Launch Alliance early Thursday delayed the launch of a triple-core Delta 4-Heavy rocket — the largest launcher in the company’s fleet — until Saturday to allow engineers more time to resolve an issue with a ground pneumatics control system.

Watch highlights from Orion’s Dec. 5 launch aboard a Delta 4-Heavy rocket as compiled for broadcast on NASA TV.

Learn more about the United Launch Alliance Delta 4-Heavy rocket as it prepares to perform the classified NROL-37 mission for the National Reconnaissance Office,