Front Matter -- Reviewers -- Contents -- Balancing Scientific Openness and National Security -- FOREIGN INTERACTIONS AND THE WEAPONS LABORATORIES -- STRIKING A BALANCE -- SUGGESTIONS FOR POLICY -- CONCLUSION -- APPENDIX A Statement of Task -- APPENDIX B Committee and Staff Biographies -- APPENDIX C Statement on Scientific Openness and National Security* -- APPENDIX D Symposium Agenda -- APPENDIX E U.S. Department of Energy Security Policies: Relevant Documents.