I have encountered some things on that but the evidence is not conclusive that the runestone is either real or hoax. There is considerable evidence elsewhere to show that the Norse visited Vinland (North America) prior to the official "discovery" of America or the others and considering some of the things the Templars were into it would not be inconcievable that they might have managed to either ally themseslves or at least hitch a ride with other Norsemen when they came here. I am not convinced either way about the Kensington Runestone but there is ample evidence as to the Norsemen having discovered America before Columbus (who incidentally never actually made it to the continent but rather Caribbean Islands)