david colby is getting his party on. the 25-year-old berkeley grad is deeply grateful to be here. >> 1, 2, 3. >> not just because he has a degree in physics. >> i want him to know that he was wrong >> early on david was told by a social worker he would never experience this kind of success. >> that i wouldnl be ae to go nefour-year university. >> the social worker was clearly wrong. they are foster kids and he is also autistic. both kids bounced round foster homes but lily never let go of david along the way becoming his protector and educational champion. >> i brag about him all of the time. >> and like any proud big sister. lily was front and center at david's graduation. >> it is a full circle moment for lily as well. advocating for herself and david inspired her to be a lawyer. both kids are sray would ver made it here without students rising above. >> it is a whole community of people that allow you to see your future as a success. >> had it not been for sra i would have never gone to berkeley. >> now back to the pa

is david colby. >> it's graduation time. >> reporter: david colby is getting his party on. >> it will be all good. >> reporter: the 25-year-old cal berkeley grad is deeply grateful to be here. >> one, two, three. >> reporter: not just because he's earned a degree in physics from one of the most prestigious universities in the country. >> i want him to know that he was wrong. >> reporter: early on, david was told by a social worker he would never experience this kind of success. >> that i would only be able to go to community college, never a four-year university. >> reporter: the social worker was clearly wrong. david and his big sister lily are foster kids he is also autistic, and brilliant. when we 1st met david back in 2012, he was literally too smart for high school. acing his college level math courses. both kids bounced around foster homes, but lily never let go of david. along the way, becoming his protector and educational champion. seeing to it that he made it to cal. >> i brag about david all the time. >> reporter: like any proud big sister, lily was front and center at davi

. >> it's graduation time and david colby is getting his party on.ley grad is deeply grateful to be here. >> one, two, three! >> and not just because he's earned a degree in physics from one of the most prestigious universities in the country. early on david was told by a social worker he would never experience this kind of success. >> that i would only be able to go to community college, never a four year university. >> the social worker was clearly wrong. you see, dave and his big sister lilly are foster kids. he's also autistic and brilliant. when we first met david back in 2012, he was literally too smart for high school, acing his college level math courses. both kids bounced around foster homes, but lilly never let go of david. along the way she became his protector and educational champion seeing to it that he made it to cal. >> i brag about david all the time. >> and like any proud big sister, lilly was front and center at david's graduation. it's a full circle moment for lilly as well advocating for herself and david inspiring her to become