Suspect identified in the National Guard D.C. shooting

Breaking news just coming into us in the last maybe 90 seconds or so. A suspect has now apparently been identified in that shooting of two National Guard troops in DC. I want to bring in our National Law Enforcement and Intelligence correspondent Tom Winter.All right, Tom, bring us up to speed. >> Yeah, Hi, four senior US law enforcement officials briefed on the investigation say they've identified the man they believe is responsible for shooting of those two National Guardsmen who are now uh in critical co ...