WUSN is a radio station in the United States. Its brand name is US99.5 and many people know it under its brand name. It is licensed to Chicago, Illinois and is owned by CBS Radio (one of the largest radio owners and operators in the United States). They did a very interesting promotion once in their history. The radio station promised to always play four songs in a row and once this promise is broken they were willing to pay $10,000 to a person who first noticed it and called them. Within 3 days they issued two checks to their most attentive listeners.