Rebel fighters carefully move into a building where they had trapped government loyalist troops during street fighting on Tripoli Street in downtown Misurata April 20, 2011 in Misurata, Libya. Rebel forces assaulted the downtown positions of troops loyal to Libyan strongman Moammar Gaddafi April 20, briefly forcing them back over a key bridge and trapping several in a building that rebel troops surrounded, firing on the rebels from upper-floor positions instead of surrendering.
