Service Structure rolled back Space Shuttle Discovery is revealed poised for launch on mission STS-102.

With the Rotating Service Structure rolled back, Space Shuttle Discovery is revealed, poised for launch on mission STS-102 at 6:42 a.m. EST March 8. It sits on the Mobile Launcher Platform, which straddles the flame trench below that helps deflect the intense heat of launch. Made of concrete and refractory brick, the trench is 490 feet long, 58 feet wide and 40 feet high. Situated above the external tank is the Gaseous Oxygen Vent Arm with the “beanie cap,” a vent hood. On this eighth construction flight to the International Space Station, Discovery carries the Multi-Purpose Logistics Module Leonardo, the primary delivery system used to resupply and return Station cargo requiring a pressurized environment. Leonardo will deliver up to 10 tons of laboratory racks filled with equipment, experiments and supplies for outfitting the newly installed U.S. Laboratory Destiny