KENNEDY SPACE CENTER, FLA. -- Kathryn D. Sullivan, the first American woman to walk in space, responds to a reporter’s question at a press conference in the Apollo/Saturn V Center following the induction ceremony of five space program heroes into the Astronaut Hall of Fame. Seated (left to right) with her are Richard O. Covey, commander of the Hubble Space Telescope repair mission; Frederick D. Gregory (second from left), the first African-American to command a space mission and the current NASA deputy administrator; Sullivan; June Scobee, representing her late husband Francis R. "Dick" Scobee, commander of the ill-fated 1986 Challenger mission; and Norman E. Thagard, the first American to occupy Russia’s Mir space station. The U.S. Astronaut Hall of Fame opened in 1990 to provide a place where space travelers could be remembered for their participation and accomplishments in the U.S. space program. To be eligible for induction, an individual must have been a U.S. citizen, a NASA astronaut, and out of the active astronaut corps at least five years. The five inductees join 52 previously honored astronauts from the ranks of the Gemini, Apollo, Skylab, Apollo-Soyuz, and Space Shuttle programs.