Washington said countries in the Middle East had offered to join air strikes against Islamic State militants and Australia said it would send troops, but Britain held back even after the group beheaded a British hostage and threatened to kill another. U.S. Secretary of State John Kerry has been touring the Middle East to try to secure backing for U.S. efforts to build a coalition to fight the Islamic State militants who have grabbed territory in Syria and Iraq. The United States resumed air strikes in Iraq in August for the first time since the 2011 withdrawal of the last U.S. troops, fearful the militants would break the country up and use it as a base for attacks on the West. The addition of Arab fighter jets would greatly strengthen the credibility of what is a risky and complicated campaign. “We have countries in this region, […]