WASHINGTON, June 6 (TNSres) -- George Washington University issued the following news: Over the course of five weeks, 12 thoroughbred horses stabled at Churchill Downs in Louisville, Kentucky have died. The causes of death are unknown at this time. The world-famous horse racing facility will cease all races at Churchill Downs while investigations are on-going. This news comes only weeks after the working military horses at Arlington Cemetery's duties were re-instated, which leads to the importa  more