Prime Minister Shinzo Abe at a World War II memorial in Okinawa last month where protesters called him a warmonger.Credit...Hitoshi Maeshiro/European Pressphoto Agency HENOKO, Japan — Orange buoys surround a wide swath of clear blue sea off the coast of Okinawa where the United States Marine Corps has long sought to build a new airfield on landfill. For more than two decades, plans for this base h