FILE - In this Aug. 28, 2010 file photo, Wade Henderson, of the Leadership Conference on Civil and Human Rights, speaks at a commemoration of the 47th anniversary of the Rev. Dr. Martin Luther King Jr.&#039;s famous &quot;I Have a Dream&quot; speech at Shiloh Baptist Church in Washington. Henderson, who will have been the president and CEO of the Leadership Conference for 20 years next year, says he will leave his post on December 31, 2016. There will be a nationwide search for Henderson’s replacement. (AP Photo/Kevin Wolf)