In this April 3, 2014 photo, Northern Illinois University police officer Maria Christiansen walks down a hallway of the student life building at the DeKalb, Ill., campus on her way to a call. A victim-turned-first-responder, Christiansen has made it her mission to make sure that what happened to her Feb. 14, 2008, will never happen to another student at her alma mater. She was one of those wounded when a gunman opened fire on campus injuring 21 and killing five students. (AP Photo/Daily Chronicle, Danielle Guerra) MANDATORY CREDIT
Featured Photo Galleries
