A police officer stands in front of a closed foothpath and a gate displaying a foot and mouth disease warning, in Flexford, near Guildford, southern England August 5, 2007. A U.S.-French pharmaceutical company was at the heart of an investigation by British authorities on Sunday to try to find the source of an outbreak of highly infectious foot and mouth disease. REUTERS/Alessia Pierdomenico (BRITAIN) | Foto: Reuters