A US military police officer stands guard during a graduation ceremony for Iraqi police officers in Baghdad on April 15, 2009. US troops could stay in violence-wracked Mosul beyond a June 30 deadline for withdrawing from Iraqi cities if Baghdad asks them to, the commander of US forces in the northern province said on April 14. Getty Images logo Getty Images 7 months ago

A US military police officer stands guard during a graduation ceremony for Iraqi police officers in Baghdad on April 15, 2009. US troops could stay in violence-wracked Mosul beyond a June 30 deadline for withdrawing from Iraqi cities if Baghdad asks them to, the commander of US forces in the northern province said on April 14.