Unfortunately, everything left in the tumbler is legitimately a hazardous material with no alternate useful purpose. Now what to do with it?
I suppose you could just send the sand contaminated with lead oxide to Nova Scotia. It sounds as if the people there are already suffering brain damage...
World-wide, Americans may carry more opprobrium than Muslims generally as a consequence of building their huge empire, often at point of the rifle supporting hideous governments to serve their economic and military interests. Cost of the In-God-We-Trust empire in human suffering surpasses what Muslims have waged against America.
