170224-N-AO823-029 PENSACOLA, Fla. (Feb. 24, 2017) David Alexander III, chief of police at Pensacola Police Department, meets and speaks with Sailors at Naval Aeromedicine Medical Institute during a Black History Month event. Alexander is Pensacola’s first black chief of police and was invited by the diversity committee at Navy Medicine Operational Training Center to be a special guest speaker at the event. (U.S. Navy photo by Mass Communication Specialist 2nd Class Michael J. Lieberknecht/Released)