(07/03/2001) -- Space Shuttle Discovery (foreground) and Space Shuttle Atlantis (background) both stand ready on their Launch Pads ( 39A and 39B respectively). Space Shuttle Discovery rolled out July 2 to be prepared for launch on mission STS-105 in August. Space Shuttle Atlantis is scheduled to launch Thursday, July 12, on mission STS-104. Towering above each Shuttle on the left is the 80-foot lightning rod that helps protect each Shuttle from lightning strikes. At right are the 290-foot water tanks that provide 300,000 gallons of water during liftoff. They are part of the sound suppression water system at each pad