John Isaacs takes down a black-and-white photo hanging on a wall in a corner of his office and flips it over. There's no date written on the back, but the presence of a middle-aged Hubert Humphrey II suggests the late Forties or early Fifties. Humphrey, mayor of Minneapolis between 1945 and '48, is standing alongside Isaacs's grandfather, Harry, in front of heaps of scrap metal, pointing to something outside the frame. "What's interesting," says Isaacs, pointing in turn, "is this guy, Humphrey, asked us to come here and buy... More >>>