Live coverage: Ariane 5 blasts off with two Intelsat satellites

Stymied by Russian government dithering that has indefinitely grounded a launch on a modified Soviet-era missile, Iridium officials say that SpaceX agreed to move up to July the first of seven Falcon 9 launches from California with the company’s next-generation mobile communications satellites.

A modified Russian missile built for nuclear war blasted off on a peaceful mission Friday, targeting placement of a European Earth observation satellite in orbit to measure atmospheric chemistry and global air quality. Liftoff from the Plesetsk Cosmodrome in northern Russia occurred at 0927 GMT (5:27 a.m. EDT).

Launching the sixth mission of the U.S. military’s super-secret X-37B spaceplane program, a United Launch Alliance Atlas 5 rocket lifted off Sunday morning from Cape Canaveral and successfully delivered its clandestine cargo to orbit.