A few days past the 75th anniversary of the Battle of Samar, researchers from Vulcan Inc.’s research vessel R/V Petrel believe they’ve found wreckage from the engagement’s famed Fletcher-class destroyer, USS Johnston (DD-557). Images of twisted metal, a destroyed deck gun, a propeller shaft and other less recognizable debris were posted to Petrel’s Facebook page Wednesday, with a video narrated by Rob Kraft, Vulcan’s director of subsea operations, and Paul Mayer a submersible pilot with the team started by the late billionaire and philanthropist Paul Allen. “This wreck is completely decimated,” Kraft says in the video. “It is just debris....