Q&A with Greg Wyler, founder and chairman of OneWeb (members only)

A sophisticated combat-ready U.S. military missile warning satellite moved to its launch pad at Cape Canaveral Space Force Station Saturday on top of a United Launch Alliance Atlas 5 rocket, ready for liftoff Monday afternoon.

SpaceX has pushed back the liftoff of a Bulgarian television broadcast satellite on the company’s second previously-flown Falcon 9 rocket until at least Friday, giving ground crews time to replace a valve on the launcher inside a hangar at its Florida launch pad.

SpaceX test-fired a Falcon 9 rocket Tuesday at Cape Canaveral for the company’s next launch, which is set for takeoff Monday at around 9:56 a.m. EST (1456 GMT). The rocket will launch with the next batch of SpaceX’s Starlink broadband satellites, the company’s first launch since early August. There is an 80 percent chance of favorable weather for launch Monday.