User blog comment:KennyChief/S.H.I.E.L.D. is a UNITED STATES GOVERNMENT organization, not International./@comment-2041242-20151017005431/@comment-2041242-20151019063059

Why the line? Because people USED to call it magic. It is a reaction to what people used to call it. Therefore a usefull line, telling humans that it is not what they thought it is.