The mission to rescue NASA's stranded astronauts has been delayed yet again, marking another setback in the nine-month-long saga. SpaceX's Falcon 9 rocket was supposed to launch from Kennedy Space Center at 7:48 pm ET yesterday, but the mission was scrubbed at the 11th hour. The mission was taking four astronauts to replace Sunita Williams and Butch Wilmore who have been stuck on the International Space Station (ISS) since June. The quad of astronauts were all ready to go and strapped into their seats when the mission was aborted less than 30 minutes before they were due to launch. Both NASA and SpaceX will convene this evening to have a second attempt at launching. Commentators from SpaceX said there would also be an opportunity tomorrow if the original backup launch also fails.