organizers responded by registering people to vote at the march in all 50 states. joe johns, cnn, the white house. >> thank you. as we go to break now the 9-year-old granddaughter of martin luther king jr., yolanda king, shares her dream for change in front of the crowd in washington today. >> i have a dream that enough is enough. and that this should be a gun free world. period. -here comes the rain. [ horn honking ] [ engine revving ] what's that, girl? [ engine revving ] flo needs help?! [ engine revving ] take me to her! ♪ coming, flo! why aren't we taking roads?! flo. [ horn honking ] -oh. you made it. do you have change for a dollar?