A launch pad problem has forced a flight delay to replace NASA's two stuck astronauts. The new crew needs to get to the International Space Station before Butch Wilmore and Suni Williams can head home after nine months in orbit.

The rocket that will launch NASA's Crew-10 is on the pad. This comes after a spacecraft swap and Falcon 9 incidents required additional testing.

Crew-10 astronauts will board SpaceX Falcon 9 rocket to International Space Station, which sets up the return to Earth of Butch Wilmore, Suni Williams