When is launch day for NASA's SpaceX Crew-10 astronauts? After an initial launch attempt that ended in a scrub minutes before liftoff, Crew-10 will try again on Pi Day. A hydraulic ground issue at launch pad 39A sparked a scrub of Crew-10's Falcon 9,

Now that SpaceX ground teams have “successfully flushed a suspected pocket of trapped air” in the ground support hydraulics system used for the clamp arm supporting the Falcon 9 rocket, there will be another attempt to launch the Crew-10 mission to the ISS tonight,

Astronauts who have been stranded in space for months are expected to return home, with help from a crew on a SpaceX spacecraft.