U.S. Air Force Senior Airman Sandra Chisholm, 633rd SFS response force leader, shadows Derrick Lee, 733rd SFS Traffic Accident Investigations police officer on the job at Fort Eustis, Va., April 16, 2014. Chisholm participated in the Security Forces/Military Police Exchange Program, where Service members from respective units switch places. (U.S. Air Force photo by Senior Airman Teresa J.C. Aber/Released)