D-10, 9, 8, 7, 6, 5, 3, 2, 1, 0, and lift off of space shuttle Atlantis. On mission to build, resupply, and to do research on the International Space Station. Houston Health controlling, Atlantis begins its penultimate journey to shore up the International Space Station. Atlantis now on the proper alignment for its 8.5 minute ride to orbit, 4.5 million pounds of hardware and humans taking aim on the International Outpost. 30 seconds into the flight, Atlantis almost 2 miles in altitude, almost 6 miles downrange from the Kennedy Space Center already, traveling 500 miles an hour. The three liquid fuel main engines now throttling back to 72% of rated performance going into the bucket reducing the speed of the speed.