A Twin Falls man charged with two counts of felony robbery is now facing additional charges.  26 year old Nicholas Sites is charged with robbing the U.S. Bank Branch on Blue Lakes Blvd. North and the Falls Ave. branch of First Federal Savings Bank.  The additional charges filed against Sites yesterday now include five charges of felony robbery with enhancements for the use of a weapon.  He was arrested for the two robberies after an extensive investigation and testimony from a jail inmate that Sites was bragging about the robberies while he was in jail on other unrelated charges.  A preliminary hearing for the new charges is now set for May 27th.  Sites could be facing life in prison for the robbery charges plus 15 years additional for each weapons enhancement charge.