Photos: Falcon takes flight

Investigators probing the Sept. 1 explosion of a SpaceX Falcon 9 rocket on its launch pad in Florida believe a high-pressure gas tank inside the launcher’s upper stage most likely burst due to the conditions of the helium loaded into it, a finding that could simplify fixes needed before the commercial booster can return to service.

Ten new satellites for Iridium’s $3 billion next-generation communications network are set for launch Monday from California’s Central Coast aboard a SpaceX Falcon 9 rocket.

United Launch Alliance and Boeing teams worked through the weekend on closeouts of the Starliner crew capsule, inspections and final outfitting of the Atlas 5 rocket. A launch readiness review Tuesday approved the continuation of final preparations for liftoff from Cape Canaveral Friday of the first Starliner spacecraft on an unpiloted test flight to the International Space Station.