wayne. heather homes is off tonight. >>> right now, thousands of demonstrators are finishing up a massive protest in san francisco against abortion to mark the 38th anniversary of roe versus wade. the event is called walk for life. john sasaki is in the city with the protesters and has a live report. >> reporter: i will tell you, all of the protesters have taken o ff. the cleaners are cleaning up after that rally. they came to this notoriously i nearl view to -- liberal city to voice their fight. >> it makes sense to be p ro- life, doesn't it? [ cheers ] >> reporter: the protesters rallied in justin herman plaza where things got heated with abortion right supporters. >> abortion rights! >> reporter: the opponents tried to block the other side's banner and someone took it a step further. >> hey! hey! hey! >> reporter: i tried, unsuccessfully, to interview the man whoer to up the -- who tore up the sign. sir, sir, you violated their first amendment rights, sir. sir, sir -- >> we know that people here are so-called pro-life or a nti- abortion. people ripped our banner, shut us down, took us down. >> reporter: the crowd took its message down the embarcadero. >> you made the choice