<P> John Lewis of SNCC was the youngest speaker at the event . His speech--which a number of SNCC activists had helped write--took the Administration to task for how little it had done to protect southern blacks and civil rights workers under attack in the Deep South . Deleted from his original speech at the insistence of more conservative and pro-Kennedy leaders were phrases such as: </P> <P> In good conscience, we cannot support wholeheartedly the administration's civil rights bill, for it is too little and too late...</P> <P> I want to know, which side is the federal government on?...</P> <P> The revolution is a serious one . Mr. Kennedy is trying to take the revolution out of the streets and put it into the courts . Listen, Mr. Kennedy . Listen, Mr. Congressman . Listen, fellow citizens . The black masses are on the march for jobs and freedom, and we must say to the politicians that there won't be a "cooling - off" period . </P>

Who organized the march and when did the march take place