North Korea conducts hydrogen bomb test; U.S. pledges 'massive' response if threatened

SEOUL/WASHINGTON (Reuters) - North Korea on Sunday conducted its sixth and most powerful nuclear test, which it said was of an advanced hydrogen bomb for a long-range missile, prompting the threat of a "massive" military response from the United States if it or its allies were threatened.

from Reuters: Top News http://uk.reuters.com/article/uk-northkorea-nuclear/north-korea-conducts-hydrogen-bomb-test-u-s-pledges-massive-response-if-threatened-idUKKCN1BD0VY?feedType=RSS&feedName=topNews