Health and Human Services Secretary Robert F. Kennedy Jr. shared photos of himself and his family at Washington, D.C.'s Rock Creek on Sunday.

Health and Human Services Secretary Robert F. Kennedy Jr. shared pictures of himself and his family swimming in Rock Creek in Washington, D.C., despite decadeslong warnings from the National Park Service not to do so.

Robert F. Kennedy Jr. plunged into a creek deemed a "hazard" to human health as part of his Mother's Day celebrations on Sunday, May 11.