(05/26/1999) -- Rollback of the Rotating Service Structure on Launch Pad 39B reveals the Space Shuttle Discovery, scheduled to launch on mission STS-96 at 6:49 a.m. EDT on May 27. Above the top of the external tank is the external tank gaseous oxygen vent arm, with a vent hood, known as the 'beanie cap,' at the outer end. Below it up against Discovery is the orbiter access arm, which allows entry into the orbiter crew compartment. through an environmental chamber or 'white room' at the outer end. STS-96 is a 10-day logistics and resupply mission for the International Space Station, carrying about 4,000 pounds of supplies to be stored aboard the station, for use by future crews, including laptop computers, cameras, tools, spare parts, and clothing. The mission also includes such payloads as a Russian crane, the Strela; a U.S.-built crane; the Spacehab Oceaneering Space System Box (SHOSS), a logistics items carrier; and STARSHINE, a student-involved experiment. The mission will include a space walk to attach the cranes to the outside of the ISS for use in future construction. Space Shuttle Discovery is due to launch on May 27 at 6:49 a.m. EDT. Landing is expected at the SLF on June 6 about 1:58 a.m. EDT