gideon yu, the president of the 49ers, is stepping down.eon yu, a big force behind the tech savvy stadium in santa clara. we now know he is stepping down as president. he will be replaced by the coo of the 49ers, a longtime lieutenant of jed york end we will bring you many development as we have them. turning out to the sitdown conversation between microsoft cofounder bill gates and michael bloomberg, the founder of bloomberg lp, they talked about their philanthropy in addition to technology. more of that conversation with betty liu. >> federal governments and state governments tend to move money around. cities are where you pick up the garbage, where you educate the kids, where you bring down crime, where you enact health measures about where you can see, where it's labeled, those kinds of things. and climate change has all been at the city level. we are trying to bring down crime and those are not done at the federal and state level. >> you have such a huge arsenal of resources. how do you pick the causes that you get behind? >> the great