London Hosts A Summit To Tackle Islamic State

LONDON, ENGLAND - JANUARY 22: (L-R) Iraq's Prime Minister Haider al-Abadi, Britain's Foreign Secretary Philip Hammond and U.S. Secretary of State John Kerry attend a press conference at the Foreign and Commonwealth Office on January 22, 2015 in London, England. The US led coalition could take up to two years to expel Islamic State from Iraq, and Baghdad's own forces will be incapable of proper combat operations for months, Britain's foreign minister warned today. (Photo by Stefan Wermuth - WPA Pool/Getty Images)