Arizona lawmakers sent a proposal to the ballot that will ask voters to give state law enforcement the power to arrest undocumented immigrants. Proponents of a citizen initiative that would institute "open primaries" in Arizona say they’ve submitted more than enough signatures to qualify for the ballot. A new study shows that the new uranium mine near Grand Canyon National Park has pumped millions of gallons of toxic water since it opened last year. Plus the latest metro Phoenix, education, business and health news.