Peshmerga fighter guard a position on front line of fighting with Islamic State (IS) militants 20 kilometres east of Mosul, on August 18, 2014. Kurdish peshmerga fighters backed by federal forces and US warplanes pressed a counter-offensive Monday against jihadists after retaking Iraq's largest dam, as the United States and Britain stepped up their military involvement. AFP PHOTO/AHMAD AL-RUBAYE        (Photo credit should read AHMAD AL-RUBAYE/AFP/Getty Images)