This weekend, technicians will continue processing work on space shuttle Discovery’s tiled heat shield as it undergoes launch preparations in Orbiter Processing Facility-3 at NASA’s Kennedy Space Center in Florida. Recent leak checks on the crew module were completed successfully with no issues arising, and work on the orbiter’s S-band antenna and front nose gear were finished. The STS-133 astronauts are spending Friday simulating their roles during the rendezvous phase of the mission, when Discovery will be steered to the International Space Station.