Introduction / John M. Logsdon -- Opening remarks / Daniel S. Goldin -- Human spaceflight and American society : the record so far / Charles Murray -- The spaceflight revolution revisited / William Sims Bainbridge -- Mutual influences : U.S.S.R.-U.S. interactions during the space race / Asif Siddiqi -- Making human spaceflight as safe as possible / Frederick D. Gregory -- What if? Paths not taken / John M. Logsdon -- Apollo and beyond / Buzz Aldrin -- Breaking in the space shuttle / Robert Crippen -- Going commercial / Charles Walker -- Science in orbit / Mary Ellen Weber --Training for the future / T.J. Creamer -- Expanding the frontiers of knowledge / Neil de Grasse Tyson -- Pushing human frontiers / Robert Zubrin -- About an element of human greatness / Homer Hickam -- The ethics of human spaceflight / Laurie Zoloth -- Future visions for scientific human exploration / James Garvin -- Preparing for new challenges / William Shepherd.
