Video: Antares post-launch news conference

SpaceX’s first upgraded Cargo Dragon spaceship departed the International Space Station Tuesday morning with more than 4,400 pounds of research specimens and other equipment, heading for splashdown Wednesday night in the Gulf of Mexico off the west coast of Florida.

Watch a replay of one of Iridium’s 10 communications satellites launched Sunday deploys from a dispenser mounted on the forward end of SpaceX’s Falcon 9 upper stage.

The latest launch date was announced late Wednesday evening, following a Tuesday night notice that May 25 was off the table. Liftoff of the Atlas 5 rocket on June 1 is set for 12:25 p.m. EDT (1625 UTC).