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CAPE CANAVERAL, Fla. - STS-125 mission specialists Michael Good (left) and Andrew Feustel greet each other after arriving at the Shuttle Landing Facility at NASA’s Kennedy Space Center in Florida in T-38 jets. They and the other five crew members are at the center for Terminal Countdown Demonstration Test, or TCDT, activities. During TCDT, space shuttle Atlantis’ STS-125 crew members will participate in a simulated launch countdown, practice emergency egress procedures at the launch pad and continue to familiarize themselves with the mission payload and hardware. STS-125 is the fifth and final shuttle Hubble Space Telescope servicing mission. Launch is targeted for Oct. 10. Photo credit: NASA/Kim Shiflett