MSN, in this case, is the Dane County Regional Airport in Madison, Wisconsin where Greta Van Susteren blogs this:

I am in the airport in Madison and an employee in uniform just came up to me and said, 'you did not hear this from me but we can't watch Fox in this airport...we are not allowed to but we sneak it in an office...we can only have the other cables on the airport televisions...by direction of one of the members of the Board of County supervisors.