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LettersLugar, Richard G.; Bayh, Evan; Markey, Edward J.; Thorson, Robert M.; Rosa, Eugene (Gene) A.; Pandora, Katherine; Caruso, David A.; Berman, lian; Cooper, Henry F.; Fine, Daniel I.; Karako, Thomas; Kennedy, Brian T.; Kueter, Jeff; Licht, Eric; McMichael, R. Daniel; Pfaltzgraff, Robert L.; Spring, H. Baker; Treadwell, Mead; Turner, Robert F.; Van Cleave, William R.; Weyrich, Paul; Payne, Keith B.; Beljac, Marko · Bulletin of the Atomic Scientists · 2007