1. Russia, the United States, and the Challenge of Global Nonproliferation Author: John Beyrle Publication Date: 10-2009 Content Type: Journal Article Institution: Council of American Ambassadors Abstract: Speaking to Russian students at the New Economic School graduation during his visit to Moscow in July, President of the United States, Barack Obama, succinctly expressed the greatest challenge facing us: the proliferation of nuclear weapons. Topic: Economics and Nuclear Weapons Political Geography: Russia, United States, and Moscow