linda brent created it after working with government chimps at laboratory. >> it bothered you. >> surethat's what spurs people on the do great things, and so i think that's very true for me. >> reporter: the 200-acre sanctuary gives the chimps their first chance to live outside cages. >> we want to give the chimpanzees opportunities to have like they would if they were in africa. to be able to replicate those kinds of environmentals and behaviors, you have to give them space, you have to give them opportunities, and you have to give them an opportunity to have a lot of social partners. >> reporter: chimpanzees have been used in the u.s. labs since the 1920s. they've been important for the development of vaccines and understanding diseases including hepatitis and aids. but advances in computer and lab technologies make large numbers of chimps unnecessary. just 50 could be kept for the possibility of newe research. >> you have a lot of feelings for your the chimps. what do you want them to have? >> i want them to have the freedom of choice and i thank's something we can give the chimps.

but linda brent figures it's a debt they are owed."cbs evening news" for tonight. for all of us at cbs news all around the world, good night. captions by: caption colorado comments@captioncolorado.com >> your realtime captioner: linda marie macdonald i'm ken bastida. allen and liz are off tonight. egin with breaking news. >>> good evening, i'm ann notarangelo. >> i'm ken bastida. allen an liz are off tonight. we begin with some breaking news. a two-alarm house fire in downtown oakland. chopper 5 is over the scene. those are live pictures on the 600 block of harrison street near 880. ladders crews are pumping water on a vacant building. smoke thick still coming from the house there. no word on how it all got started. we'll keep an eye on it. >>> the game is 2,000 miles away, but the city of san francisco is preparing right now for super bowl sunday. in fact, mayor ed lee is working up a specific game plan as we count down to the super bowl. as phil matier explains, it involves a lot of walking. phil. >> reporter: that's right. the mayo