With her cloud of snow-white hair, signature three strand pearls and compelling presence, Barbara Bush's image was what she laughingly called "everybody's grandmother." But the feisty, outspoken Bush was also a tireless advocate for literacy , an author, experienced campaigner and both wife and mother of a U.S. president. Bush, 92, died Tuesday, shortly after her family announced she was in failing health and would decline further medical treatment in favor of “comfort care.” There were no details of her specific health problems. She is survived by her husband of 73 years, former President George H.W. Bush, five children (a...