getting ready to happen in just under four hours. look at live pictures there. "discovery" will blast off at 4:50 eastern, 1:50 pacific time. the weather at the kennedy space center is perfect right now for that launch. those astronauts you see in that suv or in that motor home, they're hoping this weather holds out as well. they hope it will stay that way. five men, one woman, and nasa's first robot astronaut meet up with the international space station. this is the final mission for "discovery" but nasa has two more launches planned for this year. it's set to take mark kelly to space in april. there's word she's hoping to attend the launch. she was among 19 people shot in arizona during a political event. we want to know if you had the opportunity, if you had the opportunity to fly into space, would you you? make sure you join the discussion.