Today, the Vice President was briefed on the state of the nation’s nuclear weapons stockpile by the Directors of the three national security laboratories.  Secretary of Energy Steven Chu, Deputy Energy Secretary Dan Poneman, National Nuclear Security Administrator Tom D’Agostino, and officials from the Departments of State and Defense were also present.  The briefing was provided by Mike Anastasio from Los Alamos National Laboratory, George Miller from the Lawrence Livermore National Laboratory, and Tom Hunter from Sandia National Laboratory.  The Vice President hosted the briefing as part of the Administration’s ongoing commitment to maintain a safe, secure and effective nuclear arsenal, to the President’s vision of a world without nuclear weapons and to ratification of the Comprehensive Test Ban Treaty.