Several Israeli and American officials spoke to me on background, and I thank them now in anonymity, which is how they would prefer it. Roger and Laura Cressey tutored me on American anti-proliferation efforts and helped me to better understand the ways of Washington’s sprawling national security structure. A very special thanks to M, who taught me how to “own” a mobile phone or laptop computer. I don’t think I will ever think of my smart phone in quite the same way, and neither should anyone else for that matter.

Anna Rubin, director of the New York State Banking Department’s Holocaust Claims Processing Office, spoke with me about restitution issues and provenance searches. Peter Buijs taught me how to use the databases of the Jewish Historical Museum in Amsterdam while Sarah Feirabend of the Hollandsche Schouwburg memorial answered some final questions on the theater’s terrible history. Sarah Bloomfield and Fred Zeidman, my colleagues at the United States Holocaust Memorial Museum in Washington, D.C., were a source of constant inspiration and encouragement. As always, I stand in awe of those who dedicate their lives to preserving the memory of the six million lost to the fires of the Shoah.

Yoav Oren gave me a terrifying tutorial in Krav Maga, though somehow he managed to make it look less like a lethal form of martial arts and more like ballet. Gerald Malone advised me on the wiretapping authority of the British government and provided much-needed laughter. Aline and Hank Day graciously allowed me to stage yet another high-level intelligence conference at their beautiful home. Marguerita and Andrew Pate made the twelve-hour flight to Argentina so Gabriel wouldn’t have to.

I consulted hundreds of books, newspaper and magazine articles, and websites while preparing this manuscript, far too many to name here. I would be remiss, however, if I did not mention the extraordinary scholarship and reporting of Jacob Presser, Debórah Dwork, Diane L. Wolf, Jean Ziegler, Isabel Vincent, Tom Bower, Martin Dean, Lynn H. Nicholas, David Cesarani, Uki Goñi, Steve Coll, and David Albright. David E. Sanger and William J. Broad of the New York Times have done an exemplary job of covering Iran’s seemingly unstoppable march toward a nuclear weapon, and their learned, well-reported articles were an invaluable resource. So, too, were the authoritative reports issued by the Institute for Science and International Security and the Wisconsin Project on Nuclear Arms Control.