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Former U.S. Secretary of Defense William J. Perry (center) speaks at a press conference announcing the Bulletin of Atomic Scientists' latest "doomsday clock" estimates, as former U.S. Secretary of State George P. Shultz (left) and California Governor Jerr
Description: 
Former U.S. Secretary of Defense William J. Perry (center) speaks at a press conference announcing the Bulletin of Atomic Scientists' latest "doomsday clock" estimates, as former U.S. Secretary of State George P. Shultz (left) and California Governor Jerry Brown (right) look on.
Photo credit: 
Christian Pease
Caption: 
Former U.S. Secretary of Defense William J. Perry (center) speaks at a press conference announcing the Bulletin of Atomic Scientists' latest "doomsday clock" estimates, as former U.S. Secretary of State George P. Shultz (left) and California Governor Jerry Brown (right) look on.