Watch as Falcon 9 launches with 10 Iridium satellites and its first stage lands

A work stoppage at the Ariane 5 rocket’s launch base in South America prevented rollout of the booster to the launch pad Monday, pushing back the liftoff of two communications satellites for Brazil and South Korea until at least Wednesday.

As expected, NASA announced Wednesday that the first unpiloted test flight of a SpaceX Falcon 9 rocket and a Crew Dragon astronaut ferry ship has slipped from later this month to March 2. The first unpiloted flight of Boeing’s Starliner capsule is now targeted for the April timeframe.

The United Launch Alliance Delta 4 rocket blasts into the predawn skies at Vandenberg Air Force Base with the NROL-45 payload for the U.S. National Reconnaissance Office.