rhetorically, the answers that absenthe last 11 minutes of the speech, which were improsed, in whichg departed from hiprepared text, we wouldemember the speech as significant speech, in part because of the succe of the march itself and because o the enormous audience that king was able t speak ton television and elsewhere. we perhaps would t remember it as the dream speecbecause the cadences from which that deved, king decided extemporaneoly to deliver. weould not remember it for its commanding portrt of te united stas as a series of mountain rans fromhich freedo should ring, to eve stone down in georgia. we would not have foundeying calling from th deepeservoir materials he had bn cultivating since his studt days, and certnly as minister over the course of his caree to spontaneously ach the crowd in a way he fe he had not quite reach them befor >> you wte about the fact that he's starts -- in.is: the speech has a ll es you cahear mahalia jkson in the backgrod saying, tell him the dream, martin. she had hrd h use this refrain before he goes off script afteing encouraged by his friend