After a family asks U.S. Mint to authenticate 10 old coins, gov't grabs them. Potential value: $10M. A Philadelphia antiques dealer plans to sue the U.S. Mint to recover rare gold coins worth millions of dollars that the federal government has seized because it says they were illegally obtained. Ten "Double Eagle" $20 coins minted in 1933 were discovered in September in a Philadelphia antiques and jewelry store and voluntarily handed by its owners, the Langbord family, to the Mint for authentication. In June, the Mint confirmed they were the coveted Double Eagles but informed the Langbords that the coins...