Admiral Harold Gehman (USN Retired), Chairman Columbia Accident Investigation Board, and David Woods, PhD, Professor Institute for Ergonomics, The Ohio State University, at the hearing.

Senator John McCain (R-AZ), Chairman, presides over the hearing.

The Honorable Sean O'Keefe, Administrator NASA, testifies before the committee.

Witnesses testify before the Senate Committee on Commerce, Science and Transportation.

Admiral Harold Gehman testifies before the committee.

David Woods, PhD, testifies before the committee.

L-R: Wesley Huntress, PhD, Director Geophysical Laboratory Carnegie Institution of Washington; Robert Zubrin, PhD, President Mars Society; David Woods, PhD, Ohio State University; Mr. Richard Tumlinson, President Space Frontier Foundation