Barbara Bush will speak out about the extreme disparity in health care between the world's rich and poor at a National Press Club luncheon on Wednesday, May 26 and describe what the non-profit she heads is doing to improve public health in underserved communities here and abroad. Bush, 28, is the president of the Global Health Corps (www.ghcorps.org) , a group she helped found two years ago with input from her sister Jenna. The organization places recent college graduates in yearlong fellowships aimed at improving health care access. The first 22 fellows were assigned to 12 project sites in East...