The Paris terror attacks are likely to galvanize a stronger global military response to Islamic State, after a U.S.-led air war that has lasted more than a year has failed to contain a group now proving itself to be a growing worldwide threat.
The United States, long accused of taking an incremental approach to the struggle, is under growing political pressure at home and abroad to do more and it is expected to examine ways to intensify the campaign, including through expanded air power.
Senator Dianne Feinstein, the top Democrat on the Senate Intelligence Committee, said it had become clear that Obama's strategy of limited air strikes coupled with support for ground forces in Iraq and Syria "are not sufficient to protect our country and our allies."
Bruce Riedel, a former senior CIA expert on the region who has advised Obama, said the string of recent attacks had put to rest once and for all the debate whether Islamic State would stay focused on the war in Iraq and Syria.