The trial for a Twin Falls man accused of robbing two Twin Falls banks is set for August 23rd.  26 year old Nicholas Sites entered a plea of not guilty yesterday.  He is accused of robbing the Blue Lakes Branch of U.S. Bank and the Falls Ave. branch of First Federal Savings Bank last winter.  He is also facing additional charged after a Twin Falls County grand jury handed down indictments on one count of felony aggravated assault and five felony robbery counts, all with weapons enhancements.  During an investigation police allegedly found evidence connecting Sites with the robberies.  He faces life in prison if convicted.