Melbourne visitors and residents took to the waters of Australia's St. Kilda Beach in January 2013 to escape a fierce heat wave. Scott Barbour/Getty Images hide caption

itoggle caption Scott Barbour/Getty Images

San Francisco City Supervisor David Campos (right) walks with drag queen Sister Roma to a news conference on Sept. 17 about a Facebook policy that requires people to use their "real" names on their profiles. The site said Wednesday it will modify how the policy is enforced. Eric Risberg/AP hide caption

itoggle caption Eric Risberg/AP

Construction is continuing at the Maryland Proton Treatment Center in downtown Baltimore. It's one of three such centers under development in the Washington, D.C., region. Jenny Gold, KHN hide caption

itoggle caption Jenny Gold, KHN