Perform T-3 hour check of payload and important flight systems.
Astronauts don their flight suits.
A group of astronaut support personnel, known as the Cape Crusaders have helped prepare the orbiter for launch today. The Close-out Crew is dispatched to the White Room to prepare for the flight crew's arrival. Astronaut Terrence Wilcutt is the weather coordinator in the Operations Support Room here in Firing Room 3. Terrence will be flying the T-38 and Shuttle Training Aircraft to check the weather conditions in the KSC area just hours prior to launch. His T-38 takeoff from the Shuttle Landing Facility is slated for about 2 hours before launch and then at about 1 hour and 20 minutes before Atlantis planned liftoff, Terrence will begin weather reconnaissance in the Shuttle Training Aircraft and will remain aloft through launch.