Clock is now set at Midnight , the United States -based For the first time since atomic bombs were dropped in 1945 , leaders of nuclear weapons states are cooperating to vastly reduce their arsenals and secure all nuclear bomb-making material , '' the scientists said in a statement Thursday . group says . Midnight represents a nuclear apocalypse . Farthest had been adjusted only 18 times before Thursday . Doomsday Clock was Midnight after the signing of the Strategic Arms Reduction Treaty .
Clock is now set at Midnight , the United States -based group says . Midnight represents a nuclear apocalypse . Farthest had been adjusted only 18 times before Thursday . Doomsday Clock was Midnight after the signing of the Strategic Arms Reduction Treaty .