 And the first of what will be many congressional investigations into that incident gets underway today. WTOP's Mitchell Miller has more today on the Hill. There was obviously a gap in a security protocol somewhere. Arkansas Republican Congressman Steve Womack, who supports the probe, being carried out by the House Oversight Committee. Officials from the Secret Service are scheduled to hold a closed-door briefing with the panel ahead of testimony next week from the agency's director, Kimberly Cheadle.