High-end tour company Tauck already canceled four cruises with departures between May 30 and June 2 and has canceled the Budapest to the Black Sea tour that was set to depart Friday. "As the surge of the Danube River is. Find a river cruise on Viking River Cruises and get all the details you need. See brochures, read travel details, and book your cruise today. Viking River Cruises: (800) 706-1483…