WATCH LIVE: NASA's SpaceX Crew-10 mission set to liftoff Friday from Kennedy Space Center

Wednesday's launch attempt was called off after concerns over a critical hydraulic system popped up less than four hours before planned liftoff.

WATCH LIVE: NASA's SpaceX Crew-10 mission set to liftoff Friday from Kennedy Space Center
Wednesday's launch attempt was called off after concerns over a critical hydraulic system popped up less than four hours before planned liftoff.