Robert Francis Kennedy, Jr. (born January 17, 1954) is an American radio host, environmental activist, author and attorney specializing in environmental law. An Irish American, he is a son of Robert Francis "Bobby" Kennedy, the United States Senator for New York and the 64th U.S. Attorney General. He is a nephew of U.S. President John Fitzgerald "Jack" Kennedy. Kennedy is President of the Board of Waterkeeper Alliance, a non-profit focused on grass-roots efforts to protect and enhance waterways worldwide. He currently co-hosts Ring of Fire, a nationally syndicated American radio program. Kennedy has written three political books and two children's books. Kennedy has several times said he was considering running for elective office in the state of New York, but to date he has decided against running for office. In August 2014, Kennedy married actress Cheryl Hines, his third wife. Kennedy is an avid white-water rafter and has a longstanding interest in environmental issues related to water resources, water pollution and the Hudson River.