Obama and Cameron call on NATO

President Obama and Prime Minister David Cameron of Britain have called on NATO to reject “isolationist” impulses and confront the rising terrorist threat posed by Sunni militants in the Middle East, saying the United States and Britain “will not be cowed by barbaric killers.”

As the threat of ISIS extremists in the Middle East and Russia's actions in Ukraine unsettle the world, NATO chief Anders Fogh Rasmussen opened Thursday what has been billed as a historic summit.