Fifty years ago, it seemed like it was only a dream. Today, Martin Luther King Jr.’s dream is now a reality, though some caution there still are changes to be made. To commemorate the 50th anniversary of the March on Washington, The Times and Brenau University are serving as host to a dialogue about civil rights, beginning at 6:30 p.m. Tuesday in Brenau’s Hosch Theatre at the John S. Burd Center.