Former defense secretary and CIA director Robert Gates gave his analysis of what Monday night's horrific terror attack in Manchester signals for the future of terrorism in the West.

"Sadly, Manchester may be a harbinger of more such activities in the West," Gates told "Happening Now" host Jenna Lee at a conference on Qatar and the Muslim Brotherhood's Global Affairs.


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At least 22 people were killed and dozens more were injured when a bomb exploded Monday night at an Ariana Grande concert at Manchester Arena.

ISIS claimed responsibility for the suspected suicide attack, but U.S. intelligence officials say they have not verified if the terror group is behind the attack.

Gates predicted ISIS will become bolder in "a variety of places in the West."

Losing the Caliphate and control of stronghold cities like Raqqa has not dampened the terrorists' drive to "attacking the crusaders," Gates said.

"It just means they'll change their tactics," he concluded.


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