CRESTVIEW — Mayor JB Whitten doesn’t mind getting his hands dirty as he immerses himself in the tasks of leading the city. On Monday, he plunged wholeheartedly into learning more about the mission of the nearby U.S. Army Rangers camp as many of the Rangers live in Crestview.Whitten joined committee chair Ryan Price and fellow members of the Crestview Area Chamber of Commerce Military Affairs Committee on a boots-on-the-ground — or rather, in the water — tour behind the gates of the 6th Ranger Training Battalion.