The message arrives on my “clean machine,” a MacBook Air loaded only with a sophisticated encryption package. “Change in plans,” my contact says. “Be in the lobby of the Hotel ______ by 1 pm. Bring a book and wait for ES to find you.” ES is Edward Snowden, the most wanted man in the world. For almost nine months, I have been trying to set up an interview with him—traveling to Berlin, Rio de Janeiro twice, and New York multiple times to talk with the handful of his confidants who can arrange a meeting. Among other things, I want to answer a burning question: What drove Snowden to leak hundreds of thousands of top-secret documents, revelations that have laid bare the vast scope of the government’s domestic surveillance programs? In May I received an email from his lawyer, ACLU attorney Ben Wizner, confirming that Snowden would meet me in Moscow and let me hang out and chat with him for what turned out to be three solid days over several weeks. It is the most time that any journalist has been allowed to spend with him since he arrived in Russia in June 2013. But the finer details of the rendezvous remain shrouded in mystery. I landed in Moscow without knowing precisely where or when Snowden and I would actually meet. Now, at last, the details are set.