A first in nearly five years: U.S warships in South Korea to deter Kim Jong-un

The isolated Kim Jong-un regime has tested nuclear weapons 6 times since 2006. Its last and most powerful one in 2017 - which Pyongyang claimed was a Hydrogen bomb - had an estimated yield of 250 kilotons. Washington & Seoul officials have repeatedly warned that North Korea is preparing to carry out what would be its seventh nuclear test - A move that the United States warned would provoke a 'swift and forceful' response