so says mark phillips, who watched them in the gulf of mexico. >> reporter: something happens in theff the try tortuga islands 70 miles west of key west, florida, that happens nowhere else. every year like clockwork, sharks gather here for their annual underwater mating dance, lld the scientists gather as well to catch them. >> they love this place. >> reporter: this is a, what, shark dating bar? >> it is. it's a singles bar for sharks. r> reporter: wes pratt and nick rkitney from the new england aquarium: >> this is the only place in the world where you can study shark mating behavior on a reliable basis. op reporter: they've developed a sly technique-- moving towards the sharks as they've got their minds on something else, and netting them. it's the kind of thing you better get right the first time. >> nice! >> reporter: these are nurse sharks, not the most fearsome species, but they can still take a chunk out of you when disturbed, and this is the definition of "disturbed." >> before we started, almost nothing was known about shark mating behavior. this particular species is a win

so says mark phillips, who watched them in the gulf of mexico. >> reporter: something happens in thellow waters off the dry tortuga islands 70 miles west of key west, florida, that happens nowhere else. every year like clockwork, sharks gather here for their annual underwater mating dance, and the scientists gather as well to catch them. >> they love this place. >> reporter: this is a, what, shark dating bar? >> it is. it's a singles bar for sharks. >> reporter: wes pratt and nick whitney from the new england aquarium: >> this is the only place in the world where you can study shark mating behavior on a reliable basis. >> reporter: they've developed a sly technique-- moving towards the sharks as they've got their minds on something else, and netting them. it's the kind of thing you better get right the first time. >> nice! >> reporter: these are nurse sharks, not the most fearsome species, but they can still take a chunk out of you when disturbed, and this is the definition of "disturbed." >> before we started, almost nothing was known about shark mating behavior. this particular spe

mark phillips cbs news in the dry tortugas. >> they nameed it norah after our evening news anchor, she that's it for this tuesday from the broadcast center new york city. i'm meg oliver. >>> it's tuesday, august 27th, 2019. this is the "cbs morning news." bracing for dorian. the storm expected to gain hurricane strength. it's headed for puerto rico and the u.s. mainland as people in its path prepare for destructive winds and rain. >>> landmark opioid case. johnson & jonhson ordered to pay half a million dollars after an oklahoma judge finds the company guilty of fueling the opioid crisis. >>> and tragedy in dayton. at least two children are dead and several others hurt after a stolen police cruiser crashes.

charged with the attempted murder of a policeman, who was run over by the officer's own marked patrol car. pc gareth phillips long recovery. the number of shops that are sitting empty in town centres has reached its highest level in four years — that's according to a report from the analytics firm, springboard. the retail trade association blames sluggish sales growth and declining footfall. labour has called for a review of grouse shooting, saying it damages important natural habitats. the four—month grouse shooting season has begun today, which is known as the glorious twelfth, and will see shooters heading to moors in scotland and northern england. the family of missing teenager nora quoirin have offered a reward of around 10,000 pounds for information leading to her return. the fifteen—year—old — who has special needs — went missing from a holiday resort in malaysia more than a week ago. our south east asia correspondent — howard johnson sent us this update. they've been scouring the jungle behind me. so far, no luck whatsoever, no sighting of nora. the family today came forward to offer this reward for

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ilene bovin, richard kordelo, mark snider, david banroft, jill fox, steven edwards, and then mr. phillips. every speaker will have two minutes. thank you. >> i'll be using the overhead. >> supervisor fewer: oh, the overhead, please, mr. carroll. >> ilene bovin coalition for san francisco neighborhoods here on my own behalf. on the overhead is the proposal for the 2019 building code update. it was presented at the capital planning committee on july 22 of this year. in its presentation, the department of the environment stated that 35% of the city's emissions today is from private-sector natural gas. to reduce these emissions, the proposal is to encourage all electric design in new construction. the timeline for this proposal is for review by the department of building inspection and code advisory committee in august, the board of supervisors land use committee in september, and the full board in october. while not in the department of the environment presentation, the capital planning committee members expressed concerns. with increased reliance on electricity, the issue of reliability was

ilene bovin, richard kordelo, mark snider, david banroft, jill fox, steven edwards, and then mr. phillips. every speaker will have two minutes. thank you. >> i'll be using the overhead. >> supervisor fewer: oh, the overhead, please, mr.

catalina and phillip a typical of the social media generation she has an instagram account devoted to lifestyle topics here and he posts now and then and shows how much time they spend a day unless mark phones i mean 3 hours. i mean you know if you're with me it's between 4 and 6 hours. and trying to cut down a bit even if i just want to check something quickly i end up spending half an hour on instagram or wherever. my. question montauk is one of a handful of researches in germany systematically researching the impact of online media he believes we need to improve our grasp of social media and use it constructively rather than being in slaves buying it social media companies you sophisticated methods till you are in users and keep them. here are 3 examples 1st the like button facebook invented the thumbs up idea 10 years ago now all social media platforms have their own version. such as the instagram haunt. as far as an isolated. every single like my posts get because i put a lot of work into them like so basically instagram's currency be able when in fact . costs the next it's essential to social rewards and it's relatively clear that this simple thumbs up leads to increased activi

marked to celebrate the independence from california rules and are furthering for possible launches. global news powered by more than 2700 journalists andal insists. i'm renita young and this is bloomberg. francine? phillip out of hong kong. the g.d.p. expanding and the estimate 0.6%. protests and political zpwruppings are taking its toll and the g.d.p. numbers came in a touch we low estimates but think when the g.d.p. is from the for fresh. you look at the second quarter and a touch below estimates but not that bad. do we assume as we go forward the numbers are going to be orse for g.d.p. and hong kong? >> all indicators are they will get worse. the economy will be in a recession by the end of the year say economists. the numbers we have mostly reflects the u.s.a.-china trade war which has had an impact. and we're into our third month of the protests and that's having an impact on tourism and retail sales. from here to the end of the ear economic justs are too loud to see the foot pedal. what industries are hurt the most? >> i think francine, there's a lot of commentary around the retail, the twure ace him sectors in kick glmbingts a lot of would-be journalists fwrks not to the degree they want to and c

marks on the way out. i have been watching for the last half hour, it is quite enthralling. gripping you might say, although he did not grip that very well. nathan phillipsrs. videos posted online show a man running through the streets brandishing a knife, before people try to stop him and eventually tackle him to the ground. the injured woman is in a stable condition and is being treated in hospital. police found the body of a 2nd woman in an apartment in the same street. police say the man was acting alone. well, three britons, lee cuthbert, paul o'shaughnessy, and his brother luke, from manchester, have been hailed as heroes for their part in restraining the man. paul o'shaugnessy descibed what happened. i think he had a balaclava on, jumped ona i think he had a balaclava on, jumped on a car wielding the knife with blood on it. we thought, what is going on here? we all went down the escalator. we just continue to chase the guy while other people we re chase the guy while other people were just chase the guy while other people werejust going away chase the guy while other people were just going away because obviously he is wielding a knife. i do not kn