Actinide Research Quarterly (ARQ) | Issue Second Quarter 2011This issue of Actinide Research Quarterly is devoted to coverage of the sixth Plutonium Futures—The Science conference, which was held in Keystone, Colorado, September 19–23, 2010. Plutonium Futures is a series of international conferences that provide a forum for presenting and discussing current research on the physical and chemical properties of plutonium and other actinide elements.