September 16, 2014 -- Updated 1528 GMT (2328 HKT) Edited by Dave Gilbert in London

U.S. Defense Secretary Chuck Hagel warns that if ISIS is allowed to fester, it will "threaten our homeland" but admits the group's strength is hard to pinpoint. FULL STORY

ISIS has taken control of parts of northern Iraq but one town is trying to hold back the terror group in the face of suicide attacks. Fearful of a massacre, residents are calling on the U.S. for help.



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