While Suni Williams and Butch Wilmore have been in space for nine months, Frank Rubio was in orbit for over a year

By Joey Roulette (Reuters) -SpaceX on Wednesday scrubbed the expected launch of a replacement crew of four astronauts to the International Space Station that would have set in motion the long-awaited homecoming of U.

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.