Live coverage: Soyuz sends Russian and two Americans to space station

Officials from NASA and SpaceX briefed the media on Monday’s scheduled launch of a commercial Dragon spacecraft on an automated resupply mission to the International Space Station. It will be the 12th SpaceX cargo flight to the research outpost.

NASA astronaut Mark Vande Hei and two Russian cosmonauts will ride a Soyuz ferry ship to the International Space Station early Friday, the first step in a record crew rotation requiring two launches and two landings with four different spacecraft in just three weeks.

A forecast of low ceilings, thick clouds and rainy weather Thursday has led NASA and Northrop Grumman officials to push back the launch of an Antares rocket and a space station-bound supply ship from Virginia’s Eastern Shore to Friday morning.