Cmdr. Michael Frawley (left) shakes Capt. William Lewin's hand after Lewin transferred command of Air Station Sitka to Frawley during a change of command ceremony in Sitka, Alaska, June 28, 2018. A change of command ceremony is a military tradition that represents formal transfer of authority and responsibility from one officer to another. U.S. Coast Guard photo by Petty Officer 2nd Class Derek Mazur.