ARLINGTON, VA – DECEMBER 12: (AFP OUT) U.S. President Barack Obama (L) and Iraqi Prime Minister Nouri al-Maliki (2L) participate in a wreath laying ceremony at Arlington National Cemetery December 12, 2011 in Arlington, Virginia. Al-Maliki is in Washington for talks ahead of the December 31 full withdrawal of U.S. troops from Iraq and the end of a deeply divisive nine-year war. (Photo by Olivier Douliery-Pool/Getty Images)