By Phil Stewart WASHINGTON (Reuters) - U.S. Defense Secretary Chuck Hagel said on Thursday he discussed with France its possible involvement in the U.S.-led campaign in Syria but his French counterpart would **t be drawn on whether Paris might join in airstrikes. France was the first country to join the U.S.-led coalition in airstrikes on Islamic State insurgents in Iraq, who have also taken control of large parts of neighboring Syria during the course of the three-year-old civil war there. ...