Watch a time-lapse of the Crew Dragon access arm installation (members only)

SpaceX’s next Falcon 9 rocket arrived at launch pad 39A Thursday for a customary hold-down engine firing. Liftoff from Florida’s Space Coast is targeted for Sunday, weather permitting.

The four astronauts preparing to ride SpaceX’s Crew Dragon “Resilience” into orbit climbed aboard their spaceship Thursday at the Kennedy Space Center in a practice run for a launch to the International Space Station planned Saturday night, while mission managers monitored weather and sea conditions in recovery areas across the Atlantic Ocean.

Launch campaigns at the European-run spaceport in French Guiana — a home base for Ariane 5, Soyuz and Vega rockets — have been suspended due to the coronavirus pandemic, Arianespace said Monday.