D-10, 9, 8, 7, 6, 5, 3, 2, 1, 0, and lift off of space shuttle Atlantis. On the 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-and-a-half minute wide orbit, 4.5 million pounds of hardware and humans taking aim on the International Outpost. 30 seconds into the flight, Atlantis almost two miles in altitude, almost six miles down range 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 stress on the shuttle as it breaks through the sound barrier. 32 seconds into the flight, the three liquid fuel main engines soon will throttle back to 72% of rated performance down on the bucket reducing the stress on the shuttle as it goes transsonic.