NEW ORLEANS — Lt. j.g. Christopher Marquis relieved Lt. Molly Keyser as the commanding officer of the Coast Guard Cutter Stingray during an official change-of-command ceremony at Coast Guard Sector Mobile, Ala., Friday. As commanding officer of the Stingray, Keyser was responsible for 12 personnel in an area of responsibility encompassing the Chandeleur Islands to Carrabelle, Fla. Keyser took command...