Live coverage of Delta 4 countdown and launch

A SpaceX Falcon 9 rocket took off from Kennedy Space Center’s launch pad 39A on Thursday, then its first stage booster touched down on a nearby landing target after sending a U.S. Air Force X-37B spaceplane toward orbit.

Delays in the debut of SpaceX’s huge Falcon Heavy rocket have prompted ViaSat to move the launch of a high-speed Internet communications satellite from the new privately-developed booster to an Ariane 5 flight in early 2017, officials said last week.

SpaceX’s Falcon Heavy rocket lifted off from NASA’s Kennedy Space Center in Florida at 2:30 a.m. EDT (0630 GMT) to begin a three-and-a-half hour mission to deliver two dozen satellites into three distinct orbits. The Falcon Heavy’s two side boosters returned to Cape Canaveral for successful landings, but the center core stage crashed during a landing attempt on SpaceX’s drone ship in the Atlantic Ocean.