LOS ANGELES, June 15 (UPI) -- Former President Bill Clinton, whose memoir, "My Life," is coming to U.S. bookstores on June 22, is about to embark on a promotional tour likely to stoke public perception that he is part politician, part rock star. Clinton's book tour began on June 3 when he was the keynote speaker at BookExpo America, the annual gathering of the American Booksellers Association and the publishing industry. Plans call for hourlong interviews with Dan Rather on "60 Minutes" and with Oprah Winfrey on her daily TV show. Clinton will be on NBC's "Today" show and ABC's...