The Centers for Disease Control and Prevention has called community water fluoridation one of the great public health achievements of the 20th century. But critics say fluoridated water is not as safe and not as effective as we've been led to believe. They argue for a consumer's right to choose. Why is water fluoridation controversial? WPSU's Patty Satalia talks with Michael Connett, special projects director of the Fluoride Action Network, a group that opposes water fluoridation. (The PA Dental Association and the PA EPA declined our invitation to talk.) In the second half of the show, WPSU's Kristine Allen talks with NPR's Guy Raz about the expansion of the TED Radio Hour.