go to our website for a special look at the strides and struggles of african-american politicians during the 50 years since the march on washington. still to come, reflections on this historic day from presidents obama and clinton. you're looking live here at the lincoln memorial where crowds are just starting to gather. rain has come down so we've got an umbrella issue. by the way, in case you're wondering, white house soup of the day, mushroom and leek.