Make shuttle now on internal power. It's on the rocket. Booster flight data recorders are activated. And the handoff to Atlantis' onboard computers. Atlantis now in control of the countdown. Two, one, zero again. Lift off of space shuttle and planes. Mission to build, resupply, and to do research on the International Space Station. Houston now controlling Atlantis begins its penultimate journey to shore up the International Space Station. I'm going to Atlantis. 30 seconds into the flight. Atlantis almost two miles in altitude. Atlantis, go with throttle up. Copy, go with throttle up. Booster officer confirms staging a good solid rocket booster separation. Guidance now converging. Atlantis steering into the center lane of highway 129 on route to the International Space Station.