At least he has a plan.
Check it out:

Weeks before President Obama hosts a special U.N. Security Council meeting on foreign fighters in Syria and Iraq, British Prime Minister David Cameron has announced new steps aimed at combating the threat they pose to countries of origin on their return from the region.

Proposed measures include the seizing of passports to prevent suspected extremists from leaving Britain in the first place, and powers to prevent those already fighting for jihadist groups like the Islamic State in Iraq and the Levant (ISIS/ISIL) from returning.