Navy Secretary Ray Mabus, in his final year as service secretary, is "very proud" the Great Green Fleet will be demonstrated in 2016. Mabus told reporters Jan. 14 after his presentation at the annual Surface Navy Association conference in Arlington, VA, that the demonstration would highlight the Navy of the future. The biofuel that will be used during the demonstration is priced at $2.05 per gallon, Mabus added. "The GGF is a yearlong initiative showcasing the ways Navy and Marine...