Live coverage: Two satellites lift off aboard Ariane 5

SpaceX’s first Falcon Heavy launch for the U.S. Air Force took a major step closer to liftoff with a hold-down engine firing Wednesday night at launch pad 39A at NASA’s Kennedy Space Center in Florida. Liftoff with a cluster of experimental satellites and weather monitoring craft is set for June 24.

Europe’s venerable Ariane 5 rocket blasted off on its 117th and final flight Wednesday, successfully boosting two communications satellites into orbit but leaving the European space program without a large satellite launcher of its own until a delayed successor comes on line.

SpaceX’s Dragon cargo craft departed the International Space Station on Wednesday at 9:19 a.m. EDT (1319 GMT), concluding the commercial spaceship’s eighth visit to the complex. Splashdown in the Pacific Ocean occurred at 2:55 p.m. EDT (1855 GMT).