On March 3, the day the U.S. Treasury Department sanctioned Russian oligarch Alisher Usmanov, a cargo ship arrived in Mobile, Ala., carrying 53,000 tons of pig iron destined for a Mississippi steel plant. It came from a subsidiary of the company that accounts for much of Mr. Usmanov’s wealth, shipping records show. Another subsidiary owns the shipping firm that delivered it.
It was all legal.
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