Former President Bill Clinton, center, greets Riki Roussos, right, who slipped beyond the security barrier to meet Clinton after the U.S. Holocaust Memorial Museum's 20th Anniversary Commemoration and National Tribute to Holocaust Survivors and World War II Veterans, Washington, D.C., Monday, April 29, 2013. Also pictured is U.S. Holocaust Memorial Museum founding chairman Elie Wiesel, right. (Andrew Harnik/The Washington Times)