A silver skull grinned up from the ash. In April 1945, in the burned-out shell of Wewelsburg Castle, eyewitnesses say American soldiers sifted through cinders and found hundreds of silver Death’s Head rings—the SS Totenkopfringe—each one engraved inside with a name, a date, and the facsimile of Heinrich Himmler’s signature plus the abbreviations S Lb. for "Seinem Lieben" meaning "His Beloved." Some GIs pocketed them as souvenirs. And then the rest of the story goes dark...