Live coverage: SpaceX supply ship returns to Earth

Packed with nearly 3 tons of rocket fuel, water, oxygen and crew provisions, the Russian Progress MS-12 supply ship and its Soyuz booster arrived at a launch pad Sunday at the Baikonur Cosmodrome in Kazakhstan, moving a step closer to liftoff Wednesday on a fast-track three-hour flight to the International Space Station.

SpaceX rolled a Falcon Heavy rocket back to its launch pad in Florida Tuesday night for liftoff Thursday with a high-power Viasat broadband satellite, following an eight-day delay for a launch vehicle engine swap.

The flight included 40 deployment events for a variety of payloads, including NASA’s Pandora spacecraft. Liftoff from pad 4E happened at 5:44 a.m. PST (8:44 a.m. EST / 1344 UTC).