North Korean leader claims to have miniaturized nuclear warheads

North Korean leader Kim Jong-Un is continuing to taunt the West, this time saying his scientists have successfully miniaturized thermo-nuclear warheads to place on a ballistic missile and create a "true" deterrent, AFP reported Tuesday.

While Pyongyang has talked of success in mastering miniaturization before, this is the first time Kim has so explicitly claimed a breakthrough that experts see as a game-changing step for the North's nuclear capabilities, noted the news agency.