Last week's scathing report on the space shuttle Columbia disaster called for improvements to NASA's procedures and its culture. We'll look at the future of the space agency.
* Member, Columbia Accident Investigation Board
* Director, Space Policy Institute
* George Washington University's Elliott School of International Affairs, Washington, D.C.
* Member, U.S. House of Representatives, representing New York's 24th District (R-NY)
* Chair, House Committee on Science, Washington, D.C.