 Shannon, no question, an intense investigation underway from the moments those shots were heard last night in Pennsylvania. Here in Washington, fingers already being pointed and top law enforcement agencies, the FBI and Secret Service are asking tough questions of themselves. Authorities identified the suspect as a 20-year-old from Bethel Park, Pennsylvania. That's near Pittsburgh. His name's Thomas Crooks. He was shot to death by a Secret Service sniper. The motive still not officially known. He was taken out on this roof not far from the stage itself.