IDAHO FALLS, Idaho - An Idaho weatherman says Japan's Yakuza mafia used a Russian-made electromagnetic generator to cause Hurricane Katrina in a bid to avenge itself for the Hiroshima atom bomb attack - and that this technology will soon be wielded again to hit another U.S. city.Meteorologist Scott Stevens, a nine-year veteran of KPVI-TV in Pocatello, said he was struggling to forecast weather patterns starting in 1998 when he discovered the theory on the Internet. It's now detailed on Stevens' Web site, http://www.weatherwars.info, the Idaho Falls Post Register reported.Scientists discount Stevens' claims as ludicrous."I have been doing hurricane research for...