U.S. Secretary of Homeland Security Jeh Johnson (2nd from left) and Washington DC Mayor Muriel Bowser(2nd right) along with Harry Johnson (left), President and CEO of the Martin Luther King Jr. Memorial Foundation. participate in a wreath laying at the Martin Luther King Jr. Memorial during a ceremony on the National Mall on January 19, 2015 in Washington, D.C. Martin Luther King day was marked by many celebrations across the country. (Photo by Gabriella Demczuk/Getty Images)