Iraqi Prime Minister Haider al-Abadi, right, holds a new conference before leaving to the United States at Baghdad airport, Iraq, Monday, April 13, 2015. The prime minister is making an in-person appeal to President Barack Obama for more help in defeating the Islamic State militants, hoping recent gains in the fight fueled by U.S. airstrikes will encourage more investment from a war-weary United States. (AP Photo/Khalid Mohammed)
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