By Ahmed Rasheed and Ned Parker BAGHDAD (Reuters) - Behind black gates and high walls, Iraqi national security agents watch 200 women and children. Boys and girls play in the yard and then dart inside their trailers, located in a former U.S. military camp and onetime headquarters for Saddam Hussein’s officials in Babel province’s capital Hilla. The women and children are unwilling guests, rounded up as they fled with their male relatives in October from Jurf al-Sakhr, a bastion of Islamic State, during a Shi'ite militia and military operation to clear the farming community. ...