North Korea's Kim Yo Jong, the powerful sister of leader Kim Jong Un, criticised the Trump administration for stepping up "provocations" and said it justified the nuclear state increasing its nuclear deterrent,

Kim Jong Un, the third Supreme Leader of North Korea since December 2011, is one of the most protected heads of states. According t reports, he has more than 10 secret houses which are heavily protected,

North Korean leader Kim Jong-un visited Kim Il Sung University of Politics on the 80th anniversary of its founding, stressing that "arms without ideology are little short of ironware," according to North's state media on Tuesday.