U.S. Secretary of Defense Jim Mattis, center, is greeted by U.S. Ambassador Douglas Silliman as he arrives at Baghdad International Airport on an unannounced trip Monday, Feb. 20, 2017. Mattis said Monday the United States does not intend to seize Iraqi oil, shifting away from an idea proposed by President Donald Trump that has rattled Iraq's leaders. (AP Photo/Lolita Baldor)
{}