Live coverage: Proton soars into space with Inmarsat satellite

The long queue of satellites waiting on launches aboard SpaceX’s Falcon rockets — a backlog the company says is worth $7 billion — will stay grounded while investigators determine what caused a Falcon 9 booster to disintegrate after liftoff Sunday.

A Russian Proton rocket rolled out to a launch pad at the Baikonur Cosmodrome on Sunday with a commercial communications satellite to broadcast high-definition television channels to millions of homes across Latin America.

A Soyuz rocket is standing on the launch pad in Kazakhstan used on Yuri Gagarin’s historic first human spaceflight in 1961, ready to send three people toward the International Space Station.