Progress MS

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.

Russian ground crews are readying a robotic Progress cargo freighter for launch Thursday on an expedited trek to the International Space Station that should take less than three-and-a-half hours from liftoff to docking, cutting in half the normal transit time.