The Arab world’s foreign fighter problem makes the West’s concerns seem minor. Specific numbers should be treated with suspicion, but the current estimate is that there are roughly 15,000 foreign fighter...

Editor’s Note: The return of U.S. military advisors to Iraq and U.S. airstrikes against the Islamic State in Iraq and the Levant have dashed hopes that the United States would be able to put the latest c...

Editor’s Note: As the United States goes to war in Iraq and Syria, President Obama and senior administration officials have repeatedly stressed the threat the Islamic State poses and emphasized the organ...