Why Milk?

For years,the National Dairy Council propagated "Milk:It Does a Body Good!"All that having been emphasized it's impossible to build strong bones without cow's milk.Milk,in my dictionary,appears to be the answer to a people's prayers---until last night,Bobby talked me about his RLS(Restless Legs Syndrome).That affirmed my question again---Do we really need milk to get enough Calcium?And the problem may get worse---Does Calcium leave the bones from drinking milk?