March 11, 2009 10:44 am Breast Exams Go Digital Should your next mammogram be standard or digital? US & World Videos 1:46 Heat waves getting hotter, longer, and more frequent because of climate change 1:03 More than 2,000 people buried alive in Papua New Guinea landslide, Government says 2:33 Group of UCLA workers to walk off job over Gaza war protest response 45:40 How this surgeon wants to reinvent the American urgent care center 1:56 Mike Tyson ‘doing great' after health scare on flight