In the Kennedy Space Center's Press Site auditorium, Scott Messer, United Launch Alliance program manager for NASA missions, speaks to members of the media at a prelaunch news conference for NASA's Tracking and Data Relay Satellite, TDRS-M. It is the latest spacecraft destined for the agency's constellation of communications satellites that allows nearly continuous contact with orbiting spacecraft ranging from the International Space Station and Hubble Space Telescope to the array of scientific observatories. Liftoff atop a United Launch Alliance Atlas V rocket is scheduled to take place from Space Launch Complex 41 at Cape Canaveral Air Force Station at 8:03 a.m. EDT Aug. 18.