>> yes. >> what's a zipcar? >> one of those rental cars people don't need to go through the rental car companies but they pretty much set up an account on line and go to the parking garage and grab their vehicles. >> experienced johns often use rentals to prevent personal vehicles from being confiscated which can lead to awkward conversations with unsuspecting partners and wives. not surprisingly juan is not pleased about being exposed. >> can you turn it off, please? >> i can't turn it off. >> can you guys turn it off, please in hello. >> we know very, very little about these invisible subjects of the sex industry. >> researchers melissa farley says exposing and arresting johnses long overdue. she says criminalizing and studying their behavior is essential to stop trafficking. >> if we want to learn how to stop prostitution, we really need to know a lot about how men think about prostitution, how they make the decision to buy sex. >> anti-trafficking experts believe men will make different decisions and think t

. >> reporter: the spirit of zapata mixed with zipcars. there is a worry new money could change tricks. to help preserve the flavor of the mission district, city hall is talking about setting up a special latino cultural district like one in the city's japantown which seems to have kept the culture and low businesses alive. no one in the predominantly black fillmore district didn't. >> i think that's preserving the cultural identity of a neighborhood is really important. >> supervisor david campos wants to set up the [ non- english language ] , the 24th street cultural district, which could eventually help change zoning laws, give local businesses loans to make sure they survive, mandate more affordable housing. >> we're hoping that by doing this, the city acknowledges alleged recognizes that there's a lot of history there. >> reporter: although some economists believe such changes can actually drive prices up, cutting down on potential new building. ♪[ music ] >> reporter: and barber juan isn't worried. his building is for sale. he has be

if a valet parking service starts renting them out and sort of has a little zipcar service on the side and says, hey, while we have your car, if somebody else needs a car, we're going to rent it out to them, i think that's different from the pure valet parking service. if i could reserve the rest of my time for rebuttal. thank you. >> thank you, counsel. mr. stewart. >> mr. chief justice, and may it please the court -- i would like to begin by reinforcing two of the points that mr. clement made. the first is that what aereo is doing is really the functional equivalent of what congress in the 1976 act wanted to define as a public performance. as the chief justice said, one potential way of looking at this is that aereo and companies like it are not providing services, they are simply providing equipment that does, in a more sophisticated way, what the viewer himself can do. it's a plausible way of looking at the world. that's what the court in fortnightly and teleprompter said, but congress acted to override that and to make clear that cable services, services that used one big antenna

if a valet parking service starts renting them out and sort of has a little zipcar service on the side and says, hey, while we have your car, if somebody else needs a car, we're going to rent it out to them, i think that's different from the pure valet parking service. if i could reserve the rest of my time for rebuttal. thank you. >> thank you, counsel. mr. stewart. >> mr. chief justice, and may it please the court -- i would like to begin by reinforcing two of the points that mr. clement made. the first is that what aereo is doing is really the functional equivalent of what congress in the 1976 act wanted to define as a public performance. as the chief justice said, one potential way of looking at this is that aereo and companies like it are not providing services, they are simply providing equipment that does, in a more sophisticated way, what the viewer himself can do. it's a plausible way of looking at the world. that's what the court in fortnightly and teleprompter said, but congress acted to override that and to make clear that cable services, services that used one big antenna