. "September 2017" . . . . . . "2017 North Korea earthquake" . "N.K's 6th nuclear test" . "tested" . "the latest North Korean nuclear test" . "its sixth nuclear test" . "nuclear test" . "North Korea carried out" . "sixth nuclear test" . "Nuclear weapon testing" . "(6)" . "North Korea" . "North Korea detonated a device" . "a nuclear test in September" . "2017 North Korean nuclear test" . "2017" . "2017 North Korean nuclear test" . "sixth nuclear weapon test" . "September 3, 2017" . "hydrogen bomb test" . "North Korea's nuclear activity" . "nuclear test earlier in the month" . "nuclear" . . "a nuclear test" . . . "2017 test" . "tests a hydrogen bomb" . "seventh nuclear test" . . . . . . "2017 nuclear test" . . "In September 2017" . . "most recent confirmed nuclear test" . "12" .