Warren Buffett pocketing $12B profit on six-year old investment

Warren Buffett has proven again why he is America's most astute investor. The billionaire's Berkshire Hathaway on Friday moved to capitalize on a rejuvenated Bank of America -- and in the process pocketed a tidy $12 billion profit on its nearly six-year old investment. Here's how Buffett did it. In August 2011, with many on...