Live coverage: International crew lands in Kazakhstan

The heart of NASA’s first flight-ready Space Launch System heavy-lift rocket emerged from its factory in New Orleans Wednesday morning for a barge trip to the Stennis Space Center in Mississippi for an eight-minute test-firing of its space shuttle-era hydrogen-fueled engines.

Mission managers will be closely monitoring the weather for the first launch of astronauts aboard SpaceX’s Crew Dragon spacecraft, not just around the Kennedy Space Center, but along a corridor stretching thousands of miles across the Atlantic Ocean in case the crew capsule has to escape from its Falcon 9 rocket during the climb into orbit.

The first spacecraft in a new generation of Russian Progress cargo vehicles parked at the International Space Station on Wednesday, bringing a holiday delivery of more than 5,000 pounds of fuel, water and supplies for the research lab’s six-person crew.