Robert F. Kennedy Jr. is apologizing for saying the unvaccinated have less freedom than Anne Frank did. He's faced backlash for his comments, made at an anti-vax rally Sunday in Washington, D.C., with his wife, Curb Your Enthusiasm actress Cheryl Hines, distancing herself from his remarks. "I apologize for my reference to Anne Frank, especially to families that suffered the Holocaust horrors," the environmental lawyer and anti-vaccine activist wrote on Twitter Tuesday. "My intention was to use examples of past barbarism to show the perils from new technologies of control. To the extent my remarks caused hurt, I am truly and deeply sorry."