 In 2017, North Korea test-launched two ICBMs, the second of which had sufficient range to reach the continental United States.In September 2017, the country announced a further "perfect" hydrogen bomb test.The Korean Central News Agency claims that the "U.S. has long posed nuclear threats to the DPRK" and "the U.S. was seized by a foolish ambition to bring down the DPRK", so it "needed a countermeasure".