1. *Observatorio Astronomico Nacional, Universidad Nacional de Colombia, Santafe de Bogota Colombia; alegreif@ciencias.unal.edu.co.
2. The following abbreviations are used: ADF, Archivi del Dipartimento di Fisica, University of Trieste, Trieste, Italy; ASP, Abdus Salam Papers, NCUACS catalogue no. 99/4/1, "Abdus Salam" International Centre for Theoretical Physics Library, Trieste, Italy; EAP, Edoardo Amaldi Papers, Archivi del Dipartimento di Fisica, Universita "La Sapienza" di Roma, Rome, Italy; IRP, Isidor I. Rabi Papers, Library of Congress, Washington D.C.; FFA, Ford Foundation Archives, Ford Foundation, New York; JRO, Julius Robert Oppenheimer Papers, Library of Congress, Washington D.C.
3. 1 Angelo Ara and Claudio Magris, Trieste. Un'identita di frontiera (Torino, 1987), 192; trans. Lucretia Steward. The rest of translations in the text are all mine.
4. HSPS, Volume 33, Part1, pages 33-59. ISSN 0890-9997. c2002 by The Regents of the University of California. All rights reserved. Send requests for permission to reprint to Rights and Permissions, University of California Press, 2000 Center St., Ste. 303, Berkeley, CA 94704-1223.