In the spring of 2002, I was lunching with Charlie Scharf in the dining room of Bank One's Chicago headquarters while reporting a story on Jamie Dimon's comeback in reviving the ailing midwestern lender, following his famous firing by Sandy Weill at Citigroup. Scharf, then 37, was a rising star at Citigroup as CFO of its Corporate and Investment Bank when he took a flyer by joining Dimon to spearhead a salvage operation at a laggard so broken that many on Wall Street reckoned it couldn't be fixed.