Executive Q&A - Mark Clarke: New Dairy Expo leader a ‘cow guy’ (Wisconsin State Journal) Mark Clarke knows he has some high standards to live up to. In July, Tom McKittrick left his position as general manager of World Dairy Expo. The annual event began in 1967 as the World Food and Agricultural Foundation with its first show at what is now the Alliant Energy Center. The name was changed to the World Dairy Expo and it became a trade show in 1970 when the International Dairy Show ... [News Source]