George McGraw and his organization, Dig Deep, used to bring water access to communities in Africa.  A few years ago, he turned his attention to the United States—he now works in the Navajo Nation. The native reservation spans twenty seven thousand square miles across parts of Arizona, Utah and New Mexico, where 40 percent of the homes lack running water or sanitation. Many are in such remote areas that they will never be able to connect to a water line.