At a media conference following the Flight Readiness Review of Discovery for the STS-119 mission.

At a media conference following the day-long Flight Readiness Review of space shuttle Discovery for the STS-119 mission, NASA's Space Shuttle Program Manager John Shannon responds to a question. On the right is Mike Suffredini, program manager for the International Space Station. NASA managers decided to plan a launch no earlier than Feb. 19, pending additional analysis and particle impact testing associated with a flow control valve in the shuttle's main engine system. Photo credit: NASA/Cory Huston