CAPE CANAVERAL, Fla. -- Media snap photos while Battalion Chief David Seymour (left) and Carmel Shearer, pad rescue team driver, instruct shuttle Atlantis' STS-135 crew members during M113 armored personnel carrier training at NASA's Kennedy Space Center in Florida. From left are Pilot Doug Hurley (red cap), Mission Specialist Rex Walheim, Commander Chris Ferguson, Mission Specialist Sandy Magnus (blue cap). An M113 is kept at the foot of the launch pad in case an emergency exit from the launch pad is needed and every shuttle crew is trained on driving the vehicle before launch. The STS-135 crew is at Kennedy to participate in a launch countdown dress rehearsal called the Terminal Countdown Demonstration Test (TCDT) and related training. Atlantis and its crew are targeted to lift off July 8, taking with them the Raffaello multi-purpose logistics module packed with supplies and spare parts to the International Space Station. The STS-135 mission also will fly a system to investigate th