Planes, mission to fill, resupply, and to do research on the international D-10, 9, 8, 7, 6, 5, 3, 2, 1. Houston-Malgued trolling, Atlanta's begins its penultimate journey to shore up the International Space Station. It's 8.5 minute line to orbit, 4.5 million pounds of hardware and human. 30 seconds into the flight, Atlanta's almost two miles in altitude, almost six miles downrange from the Kennedy Space Center already trained. The three liquid fuel main engines now throttling back to 72% of rated performance going into the bucket reducing the stress on the shuttle as it breaks through the sound barrier.