Washington (AFP) - US President Barack Obama on Thursday called on Middle Eastern leaders to stand up to "violent extremism" and stop proxy wars that fuel the rise of terror groups. "The notion that the West is at war with Islam is an ugly lie," he told the final day of a conference on combatting extremism. "And all of us, regardless of our faith, have a responsibility to reject it." Obama challenged Middle Eastern powers to stop actions that he claimed have stoked the rise of Islamic State, Al-Qaeda and others. Fighting between Sunnis and Shia "will only end when...