Katie Couric is a bullying diva who capitalized on her status as a widowed mom, a nasty hatchet-job of a new book claims. The most shocking tale in author Edward Klein's unauthorized biography, "Katie: The Real Story," is that Couric's marriage to Jay Monahan was on the rocks long before he died of cancer in 1998. Quoting one of his numerous unnamed sources, Klein claims the couple had grown so far apart that the "only thing that stood between Katie and divorce was her fear of negative publicity." Other unnamed sources told Klein the superstar anchor made Monahan "feel as...