North Korea has vowed to "continuously and limitlessly" bolster the nuclear war deterrent, denouncing the arrival of a US nuclear-powered submarine in South Korea. "The DPRK's nuclear war deterrent to cope with and contain various threats from outside is bound to be bolstered up both in quality and quantity continuously and limitlessly as the security of the state is constantly exposed to the US nuclear threat and blackmail," Kim Yo-jong, the sister of North Korean leader said in a statement carried by the North's Korean Central News Agency (KCNA). "The US strategic assets will never find their resting place in the region of the Korean peninsula," Kim said. She still said "nothing will change," stressing that such nuclear-powered submarines can never be an "object of fear." The remark came a day after the 7,800-ton USS Vermont entered a major naval base in Busan, 320 km southeast of Seoul. Source: Qatar News Agency