leader nancy pelosi and the families of trayvon martin and of course martin luther king iii scheduled to join us at some point here over the next hour or so, and again right now thousands about to start retracing the steps that marchers took 50 years ago. so has peter alexander who is along the march route and let me start with you. what is the scene like right now? >> so right now we're along the route on independence avenue and you can see the police are clearing the way as they arrive here at the martin luther king memorial. we are joined by so many people who witnessed history as we wait to see those who participated in it, one of those voices is the gentleman i met today named franklin delano, no roosevelt, but williams. you happened to be here on that day, for the first time visiting