Active shooter: Are you prepared?

Role players burst through a doorway at the Homeland Security Center of Excellence during an active shooter scenario at the New Jersey Department of Military and Veterans Affairs campus, Lawrenceville, N.J., Jan. 13, 2016. Members of the U.S. Marshals Service and the Lawrence Township Police Department participated in the exercise, which tested the department’s active shooter procedures. (U.S. Air National Guard photo by Master Sgt. Mark C. Olsen/Released) (This image was cropped to focus on the subject of the image)