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A small group holds a candle light vigil on Freedom Plaza to remember the victims of the shooting at the Washington Navy Yard, Mon Secretary of the Navy Ray Mabus speaks with Dr. Janis M. Orlowski as they walk in the corridor at Washington Hospital Center, in W Debris sits in front of the last known address of Aaron Alexis Monday, Sept. 16, 2013, in Fort Worth, Texas. Police have identifie Secretary of the Navy Ray Mabus speaks during a news conference at Washington Hospital Center, in Washington, Monday, Sept. 16, 2 A U.S. Park Police helicopter removes a man in a basket from the Washington Navy Yard Monday, Sept. 16, 2013. Earlier in the da This booking photo provided by the Fort Worth Police Department shows Aaron Alexis, arrested in September, 2010, on suspicion of d A U.S. Park Police helicopter removes a man in a basket from the Washington Navy Yard Monday, Sept. 16, 2013. Earlier in the da Secretary of the Navy Ray Mabus speaks during a news conference at Washington Hospital Center, in Washington, on Monday, Sept. 16, District of Columbia Police Chief Cathy Lanier, center, flanked by Rep. Eleanor Holmes Norton, D-D.C., left, and District of Colum This booking photo provided by the Fort Worth Police Department shows Aaron Alexis, arrested in September, 2010, on suspicion of d This photo, which AP obtained from Don Andres and has been authenticated based on details in it, shows emergency personnel attendi A U.S. Park Police helicopter flies over a building at the Washington Navy Yard in Washington, Monday, Sept. 16, 2013. At least on These images released by the FBI show photos of Aaron Alexis, who police believe was a gunman at the Washington Navy Yard shooting A U.S. Park Police helicopter removes a man in a basket from the Washington Navy Yard Monday, Sept. 16, 2013. Earlier in the da Police work the scene on M Street S.E. in Washington, where a gunman was reported in a military building at the Washington Navy Ya