From stray pens to birds, Mike Leinbach, retired launch director, explains why shuttle launches sometimes got scrubbed.

Add Yahoo as a preferred source to see more of our stories on Google. Ready for liftoff? What could be the final rocket launch of August in California is due up overnight. Just keep in mind that ...

A very early morning, or late-night, depending on how you look at it, SpaceX rocket launch is expected to lift off from Florida this week. If all goes according to plan, a SpaceX Falcon 9 rocket will ...