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SPACE STUDIES BOARD JOHN H. McELROY, University of Texas at Arlington (retired), Chair J. ROGER P. ANGEL, University of Arizona JAMES P. BAGIAN, Veterans Health Administration's National Center for Patient Safety ANA P. BARROS, Harvard University RETA F. BEEBE, New Mexico State University ROGER D. BLANDFORD, California Institute of Technology JAMES L. BURCH, Southwest Research Institute RADFORD BYERLY, JR., University of Coloraclo HOWARD M. EINSPAHR, Bristol-Myers Squibb Pharmaceutical Research Institute (retired) STEVEN H. FLAJSER, Loral Space and Communications, Ltd. MICHAEL H. FREILICH, Oregon State University DON P. GIDDENS, Georgia Institute of Technology/Emory University RALPH H. JACOBSON, The Charles Stark Draper Laboratory (retired) MARGARET G. KIVELSON, University of California, Los Angeles BRUCE D. MARCUS, TRW, Inc. (retired) HARRY Y. McSWEEN, JR., University of Tennessee GEORGE A. PAULIKAS, The Aerospace Corporation (retired) ANNA-LOUISE REYSENBACH, Portland State University ROALD S. SAGDEEV, University of Marylanc! CAROLUS J. SCHRIJVER, Lockheed Martin Solar anal Astrophysics Laboratory ROBERT J. SERAFIN, National Center for Atmospheric Research MITCHELL SOGEN, Marine Biological Laboratory C. MEGAN URRY, Yale University PETER W. VOORHEES, Northwestern University J. CRAIG WHEELER, University of Texas, Austin JOSEPH K. ALEXANDER, Director