farm workers on mural, and then it goes all the way to manny pacquiao >> reporter: manny pacquiao thest who helped organize neighborhood outreach meetings for survey l.a. >> we'd have folks bring in photographs, we'd interview them for oral histories, any kind of material they might have. >> reporter: what do you say to them? bring in your history? >> yeah. we'd say bring what you've got. sometimes people have boxes that their parents or grandparents just kept.ç survey l.a. allows us to really honor the everyday vernacular of different and diverse communities: the residents, the business owners, the community organizations, the churches here in the neighborhood. it's great because they feel like our story matters and it's worth preserving.ç >> reporter: there are also important economic factors at play, of course. tourism, for one. and, says ken bernstein, effective city planning that aids both local officials and developers, who'd rather know about historic preservation sites up front, rather than be surprised well into a project. >> los angeles always has significant development p

six-time trainer of the year, who worked with champions like mike tyson, oscar de la hoya, and manny pacquiaoawler from a dead- end boston neighborhood, roach admits he overstayed his welcome inside the ropes. >> i had to retire because of parkinson's. >> reporter: so the sport you loved may have triggered your parkinson's? >> yes. >> reporter: roach's diagnosis, trauma-induced parkinson's, left the 54-year-old with mild hand tremors and slurring speech, but so far he's avoided more serious symptoms. he takes medication and botox injections to control spasms. but doctors also credit roach's rigorous workout routine, heavy on hand-eye coordination drills. >> when i get in the rings, i have no symptoms whatsoever. >> reporter: still in the methodical mayhem that's boxing, a question shadows freddie roach. do you have any concerns that the young boxers you're training now may one day suffer your fate? >> yes, i do. that's why i'm watching closely. i know my fighters well. that's the hardest thing in the world to do for me. it's very difficult to tell a fighter it's over. >> reporter: roach reali

. >> when are we going to see you fight manny pacquiao? is marcos maydonna. that's my focus. i got to where i got to by taking one fight at a time. got to 45-0 by not focusing on other things and other opponents that i shouldn't be focusing on. right now the guy that's in front of me is marcos maydonna so that is who i should be focused on. >> you're an overwhelming favorite going into the fight saturday night. how are you feeling about it? >> you can overlook no guy. marcos maydonna got here by doing the right thing and he's a guy i know i can't overlook. that's why in training camp i pushed myself to the limit, and i had a tremendous training camp. we got all the right boxing, and now it's time to go out there and give the people what they want to see, excitement. >> i was just going to say i hear the tickets on paper zhu are pretty expensive. can you guarantee a good fight tomorrow night? >> i can promise a good fight tomorrow night. >> can you help me work on my shoulder roll defense. >> sarah is a boxer. >> sarah is a boxer and i don'

these days i understand that you had some of these big-name boxers, manny back pacquiao and floyd "moneyher. do you think if they went back in time and fought you guys, basically the basis of a rocky movie, would they win and would they have a chance against you? >> no. >> so that can't mean that this is about exposure then. why would the exposure level, do you think, change the level of talent and the quality of these guys today? >> because basically when -- during my era there were other great fighters, other fighters that were comparable to my experience. now you have whether it's mayweather or pacquiao at the time, they were a step or so ahead from the other guys, from an exposure standpoint and from an experienced standpoint and that has changed. back in the '70s and '80s were great fighters. >> yeah. and by the way, you're still in great shape today. kudos to you for that, i know that's something you're a proponent of, and by the way, know also a little bit about your charity efforts, have a big charity event going on tomorrow. you're working on diabetes. how important is that to y