Live coverage: Proton rocket blasts off on lengthy 15-hour mission

A Russian Soyuz rocket rolled out to a launch pad in Kazakhstan early Thursday in preparation for liftoff Saturday with a Russian commander, Italian flight engineer and U.S. astronaut heading for the International Space Station.

The launch of a Soyuz rocket with a Progress refueling and resupply freighter was aborted seconds before liftoff Thursday in a rare scrub for Russia’s workhorse rocket, delaying the start of a journey to the International Space Station until at least Saturday and thwarting plans to test out a new automated fast-track rendezvous sequence.

Watch the first SpaceX Falcon 9 rocket launch since a catastrophic launch pad explosion at Cape Canaveral. The Falcon 9 first stage was successfully recovered after landing on a floating platform in the Pacific.