“‘Despite the loss of its former caliphate, ISIS has not been defeated,’ warned Michèle Flournoy, who served as under defense secretary for policy from 2009 to 2012.

“‘We have seen this movie before,’ said Flournoy, who was expected to become defense secretary if Hillary Clinton won the 2016 presidential election. ‘When a terrorist organization loses territory, it usually goes to ground in order to fight another day. (This was certainly true for Al Qaeda in Iraq, ISIS’ predecessor.)’

“‘ISIS is likely to revert to the more traditional tactics of an insurgency like IEDs, suicide bombers, car bombs, assassinations and the like to disrupt stability and prevent others from consolidating control. They may be down, but we would be foolish to count them out…'”

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