ANNAPOLIS, MD -- The Navy's expeditionary warfare office is preparing an overarching mine warfare plan, which will eventually be approved by the service's top admiral and general, to more clearly communicate its strategies and objectives, according to a Marine Corps general overseeing the effort. Maj. Gen. David Coffman, the Navy's top expeditionary warfare requirements officer, told reporters at a conference here yesterday he believes the service needs a mine warfare plan, endorsed by the chief of naval operations and Marine...