One of the main political objectives of this year's UNGA is getting countries around the world to agree to a common plan to defeat the rise of extremist groups. The focus this time around is on ISIS and the estimated 12 thousand foreign fighters who are thought to be fighting alongside the terrorist group in Iraq and Syria. The largest group of militants comes from Tunisia. Becky raised the issue with Tunisia's Prime Minister Mehdi Jomaa.

Five Arab states have confirmed they are taking part in the U.S.-led military campaign against ISIS. We explore why each of the five countries are taking part and what this unprecedented united action means for the region.