Live coverage: SpaceX cargo ship arrives at space station

A commercial resupply freighter owned and operated by SpaceX wrapped up a two-day trip to the International Space Station on Wednesday, delivering a new docking port and two tons of other equipment to research laboratory more than 250 miles above Earth.

NASA and Northrop Grumman managers at the Kennedy Space Center decided Tuesday to press ahead with final preparations to launch a NASA scientific research satellite early Wednesday aboard an air-launched Pegasus XL rocket off Florida’s east coast.

Ten days after the last liftoff from historic launch pad 39A in Florida, another SpaceX Falcon 9 rocket ignited its Merlin main engines for several seconds in a hold-down firing Thursday ahead of a planned expendable flight next week with an Inmarsat communications satellite.