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Assesing the threat of ISIS
Gen. Barry McCaffrey and fmr. Secretary of Defense William Cohen join Brian Williams to discuss last Friday's Paris attacks, the balance between safety and personal liberty and how the U.S. and Europe should respond.
Attacks on Paris
Bataclan reopens on eve of attack anniversary02:05
A history of the terror attacks in France01:07
Paris attack survivor reflects 6 months later03:17
ISIS has head start on Western infiltration11:12
ISIS develops new skill at bomb-making06:53
Paris terror suspect ran a bar, 'sold hashish'03:29