Steven Pifer is an affiliate with the Center for International Security and Cooperation, and at The Europe Center at the Freeman Spogli Institute for International Studies at Stanford University, where his research focuses on nuclear arms control, Ukraine, Russia and European security.. In addition to working in the Foreign Service for more than 25 years, Pifer served as a U.S. Ambassador to Ukraine from 1998 to 2000. He is a non-resident fellow at the Brookings Institution. 

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