The Greenpeace thermal airship A.E. Bates flies over activists displaying messages for Duke Energy. Banners on the airship read "Duke: Don't Raise Rates for Dirty Energy" and "Cleaner is Cheaper." The message on the ground reads "We want affordable rates & clean air. Be a leader Duke." The flight calls attention to the largest energy supplier in the United State's plans to continue using coal, nuclear and other forms of dangerous energy at great public cost.