singer and song writer bob dillan turned 70 years old. in january another iconic performer of the 60s also turned 70 years old. together they made much of the sound track for a generation of protests. >> ♪ >> reporter: in fact, it was biez who introduced an unknown bob dillan at a festival. biez performed at one of the pivotal events, the march on washington. >> ♪ we are not afraid >> reporter: it was there that dr. martin luther king jr. delivered his i have a dream speech. bob mckinzey took a look back at that speech. >> reporter: 250,000 people descended on washington, d.c., coming from everywhere by bus, train, car and thousands had walked. they marched to the mall where the reverend martin luther king jr. already renowned as a fearless leader was to make the speech of his life. >> i have a dream. >> reporter: the reverend cecil william of dwight memorial church was there. >> i just said, something exciting is really taking place today. because there were just hoards of people. i mean people coming from every direction. and i was