A Free Syrian Army fighter aims his weapon during a battle with Islamic State militants in Aleppo, Syria. Members of the Islamic State have been marching in the northern province of Aleppo capturing areas under the control of the mainstream Free Syrian Army.
A Free Syrian Army fighter aims his weapon during a battle with Islamic State militants in Aleppo, Syria. Members of the Islamic State have been marching in the northern province of Aleppo capturing areas under the control of the mainstream Free Syrian Army. File photo The Associated Press
A Free Syrian Army fighter aims his weapon during a battle with Islamic State militants in Aleppo, Syria. Members of the Islamic State have been marching in the northern province of Aleppo capturing areas under the control of the mainstream Free Syrian Army. File photo The Associated Press

Michael Gerson: U.S. must gear up to face the threat of the Islamic State

August 21, 2014 3:54 PM