monica ghandi, u.c.rancisco, thank you very much. >> thank you. >> nawaz: the high stakes court battle between apple and epic games, the maker of "fortnite," one of the world's most popular video games, is nearing an end. and today featured an important moment-- apple c.e.o. tim cook took the stand to defend the company's app store against charges that it's grown into an monopoly. lisa desjardins has a look at the antitrust trial that could have big implications for apple, other smartphones, and apps. >> desjardins: amna, this was the first time tim cook has ever taken the witness stand in a courtroom. this battle first started in august of last year, when epic announced it added a n direct payment plan. that gave "fortnite" players the option to purchase virtual currency from epic's payment system, rather than from apple. apple-- and google, too-- take a 30% cut on purchases done through their app stores. "fortnite" was soon pulled from the app store, leaving millions unable to update the popular videog

monica ghandi advised the biden administration on when to lift the national mask rules, so we asked her. do you feel california could have followed the cdc's mask guidance today? >> they could have based on the low rates and high vaccination rates. >> reporter: glad there is a four-week buffer. >> i'm relieved that the state has recognized that. we in marin county, we have some of the highest vaccination rates in the state, and we, ourselves, don't feel ready. >> reporter: here is why he says that timeline is essential. >> but now, you know, we are mid may. really the only people who are fully vaccinated before the end of march. >> reporter: in san francisco, 60% of the population has received at least one dose of the vaccine. they are gearing up to change their vaccine strategy. what specifically will san francisco do during these four weeks? >> reporter: some of the things that are being done are to actually provide door-to-door invitations to get vaccines in the neighborhood where we know that there is a lower rate of vaccination. >> reporter: dr. phillips says san francisco would ha

monica ghandi said the mixed messages don't help. and the rules should be driven by the metrics we've all followed the entire pandemic. >> you want to lift an indoor mask mandate, you can still recommend date, but a mandate is in the context of a public health emergency. so at some point it will be lifted. >> reporter: she says it could end when 70% of californians have at least one dose of the vaccine and there are less than two cases per 100,000 people. she thinks both could be achieved by july fourth. >> i think putting in something clean like that does give people something to know the next step and i think it's a good idea. >> reporter: if the mandate is lifted, most are lifted. >> i'm comfortable with it. i see all my friends getting vaccinated. i'm fully vaccinated. >> i think i'll keep it a little bit longer until i feel comfortable. >> reporter: in san jose, ian cole, nbc bay area news. >> that's going to be a big day for a lot of us. a bold proposal for a candidate hoping to protect gavin newsom. kevin faulkner wants to eli

monica ghandi. but first, we go to japan where calls are growing to cancel next the summer olympics. >> we need to stop preparing for the games and that is what we're calling for the tokyo games to be canceled. amy: as the japanese doctors union and many others call for the olympics to be canceled as kobe spikes in japan, we will speak to a leading japanese critic of the games, and jules boycoff, a scholar and former member of the u.s. olympic soccer team, about the clashing dynamics in tokyo. the conavirus-driven state of emergency. >> right now as tokyo prepares host the olympic games, we ar witnessing a cascade of lamities. we have the mecal officials in e country jumping up and down demandin cancellations. we have more than 80% of the pulationhat does n want the games to happen this summer. the athletes are amang to hold, no question abt that. but there is no reason to hold an optional sporting spectacle in the middle of a global health pandemic. amy: all that and more, coming up. welcome to dem

monica ghandi. dr. fauci was on capitol hill.not doing enough to explore the lab theory, were pressing him, listen. >> why did you dismiss the lab leak theory as credible? >> i didn't dismiss anything. i just said it's the high likelihood that this is a natural occurrence from the environment of an animal reservoir that we have not yet identified. no one knows, including me, 100%, what the origin is, is the reason why we're in favor of further investigation. >> help us, from a science standpoint, doctor, what would you need to have a definitive answer? is it access to the records of patient zero? is it access both to the lab and back to the wet market? what are the pieces you would hope would get you to a definitive yes or no about where this started? >> well, it's a great question. i do want to reiterate what dr. fauci said that we really don't know but i will say something really important, that there have been two other coronavirus pandemics like this. they've just been so much more limited, that they didn't get this worldwide