says they're looking into their digital media. >> the cell phone, the computers, hit social media companies with preservation orders to make sure that no evidence can be destroyed. >> reporter: with large crowds expected for tuesday's game and the hotel's close proximity to coors field, sweeto said -- >> everybody go! >> reporter: the 2017 las vegas shooting where a lone gunman opened fire on the crowd, killing dozens and wounding hundreds more was not far from anyone's mind. >> and that was really a seminole incident for law enforcement and hotel security. and they never really were able to look at these large events the same way again. >> i can tell you that if i would have saw something like that, if i would have seen them preparing for something like that, i would have intervened, absolutely. >> reporter: and denver's mayor said he has spoken to major league baseball and the colorado rockies, and tuesday's game is going ahead. he wants everyone to understand and to be reassured that the event and the area are safe. >> that was catherine herridge

reporting.

you said that you would shave your eyebrow off for a #klondike. go go. ohhh. [hysterics laugh] ♪ start your day with crest 3d white and from mochaccinos to merlot, [hysterics laugh] your smile will always be brilliant. crest 3d white brilliance. 100% stain removal, 24 hour stain resistance to lock in your whitest smile. crest. the #1 toothpaste brand in america. for as long as anyonmeer chf th awhere icountry, frora to striped bass to oysters. but now the oyster population is in dang years of overharvesting, pollution, and disease has caused more than 99% of the

native oyster population to just disappear. one state is now turning the tide, or at least working to turn the tide. skylar henry reports from maryland's eastern shore. >> reporter: as the sunrises over the little choptank river, there is a crew hard at work, responding to a crisis underwater that's been unfolding for centuries. declining population of the native chesapeake bay oyster. inside each of these 3,000 gallon tanks are millions of future oysters, the work done by nonprofit the oyster recovery partnership. >> the work that we're doing is all in maryland at this point, working in tributaries within the bay to restore those oyster reefs. >> reporter: leading the restoration effort, executive director ward slacum. >> oysters are important to the cultural heritages of maryland. for one, oysters being the keystone species, it means they're really critical to not just the ecosystem of the bay, but all the other animals that

reside in the bay. but the harvest of those oysters also contributes to the economy. >> reporter: maryland's seafood industry is responsible for bringing in nearly $600 million annually. >> hi, may i help you? >> reporter: businesses like faidley seafood in baltimore, maryland are directly dependent on the bay's overall well-being. >> well, without the oysters, we don't have anything. we need that oyster to siphon and clean the water in the chesapeake bay. >> reporter: dami hahn is the fourth generation running faidley's. >> 100 years ago, our oyster population could do it in 20 hours. our current oyster population takes nearly a year to do the same job that it could do in 24 hours. we can't do what we do in providing fresh local without fresh local. so the health of the chesapeake bay is key to our success. it's key to our future. >> reporter: the faidley family has owned and operated the market for more than 130 years. >> through the 1800s, early 1900s, the oyster industry was

really what defined baltimore. a lot of areas would back fill with oyster shells. they used crushed oyster shells. so we were using the shells, not realizing that they needed to go back into the bay. >> reporter: it wasn't until the 1950s when scientists discovered the link to the bay's declining >> we were depleting our supply, and that these oysters needed old oyster shells in order to grow new baby oysters. >> reporter: but with the shell shucked and the oysters dressed. >> cocktail and a little squeeze of lemon. >> reporter: there was no easy way to get the used shells back into the waters. >> cheers. >> cheers. there you go. >> reporter: that's so good. >> they are so good. >> reporter: so good. >> now we have to recycle these shells. >> reporter: faidley's is one of 400 area seafood restaurants, markets, and public job sites that has been recycling their shells through the oyster

recovery. oip crews pick up the shells and bring them to be reprocessed over the next year. >> when we get the dirty shells, they're aged, they're cleaned, and then they're loaded into the containers and placed into the tanks ready for us to put larvae in it. >> reporter: stephanie alexander is the laboratory's lab manager. >> they are spawning and adding to the population. and they're also helping with shoreline stabilization as well as nutrient sequestration. overall, they're extremely, extremely valuable. they're the little kidneys of the bay. >> reporter: but these vital organs of the chesapeake need some assistance to repopulate at a rate needed to keep the bay clean. >> we have a bunch of oysters that we don't know the sex of yet, getting ready to start their reproduction. >> reporter: around 25,000 adult oysters a year are rotated through these spawning tables. >> they're filtering this water in, and they are tasting it to say hey, somebody else is spawning. i need to start spawning in response. it's a chain reaction.

because they have to spawn at the same time in order for fertilization to take place. >> reporter: in about two weeks, the fertilized eggs will be mature enough to be drained from their indoor incubators. gathered for their next stage in life. >> right now there is five million larvae in my hands. >> reporter: the bundle of larvae will be set in one of the outdoor tanks that's filled with the recycled oyster shells. the goal, to get the larvae to attach to the shells where they'll grow for life, a process known as spat on shell. after another week or so, they're loaded up on to a boat and released into the water. orp says they've planted around 8.5 billion juvenile oysters back in the waters, and have rehabbed reefs and two tributaries with three more to go, set to be completed by 2025. >> there is a lot that goes into this fundingisl, right? >> absolutely. it's definitely a multimillion-dollar operation to restore oysters annually in

maryland. and there is a huge commitment from the state of maryland to provide that funding. noaa also provides funds, and so does the u.s. army corps of engineers. >> reporter: but man made challenges are once again risking the oyster's survival. >> historically, overharvesting and disease issues were the big driver of the decline of the oysters. now i think it's lack of suitable substrate, because as the land becomes developed, you have more runoff, and in that runoff you have more sediment, and that sediment is falling out and burying the oysteries. shelling is very limiting so we need everything we can get. there are little steps everybody can get involved in. you can eat oysters. you support oyster aquaculture farms and just make it a big circle of oyster love. skylarhenry. >> maryland is also working to clean up baltimore harbor, but it's not using oysters. gglyed garbage grabbing invention is

mr. trash wheel. he is the first member of a collecting family that keeps this section of the baltimore harbor clean. and now the family is growing? >> that's correct. we actually have four trash wheels here in baltimore. mr. trash wheel, professor trash wheel, captain trash wheel, and very soon glenda the good wheel of the west. >> reporter: it was his idea to make the trash wheels memorable. >> i built the first set of googly eyes in my basement. >> reporter: but it was john kellett's idea to make them in the first place. he was simply sick of seeing trash. >> every day i would think about it. >> reporter: he drew a prototype on a napkin and contacted city leaders. >> if we didn't pick it up, it's causing problems not just for weeks or months or years. it's causing problems for hundreds of years. >> reporter: not just in the harbor, rivers worldwide feed into the ocean. >> the flow of the river that brings the trash helps turn that wheel. >> reporter: when the river is calm, solar power kicks in. these rakes bring the trash

closer to the conveyor belt which feed into it a dumpster. since 2014, trash wheels here have collected more than a million styrofoam containers and plastic bottles, and more than 12 million cigarette butts. the team gets calls each week from cities throughout the k and around theldbout replicating the technology. >> it makes me giggle. and it's fun. and it's doing good. >> i think it's pretty ingenious. >> it's also made a huge difference to inspiring people to become part of the solution. >> reporter: the newest member, gwenda is shinier and has more solar panels. with her at work, it's all hands, or googly eyes on deck. debra alfaron, cbs news, baltimore, maryland. it's not only pollution threatening ocean life around the world. environmentalists are also fighting an explosion of natural predators like the sea urchin. tina kraus has the story. >> reporter: these divers in australia are more like

fishermen with finish, looking for a good catch. >> sea urchins are moving through these reefs, sometimes in really dense fronts, almost like little armies moving along and clearing everything in their path. >> reporter: they're collecting menacing sea urchins to stop the spiny creatures from devouring huge amounts of kelp that capture and store harmful carbon dioxide. divers put the pests on a plate for a seaside snack. >> we can eat it and help solve an environmental problem at the same time. >> reporter: well-known as uni in japan, some restaurants in australia are also touting urchins as a delicacy. even to garnish cocktails. but not everyone is feasting on the little critters. >> every time we tell them about sea urchin, they always say no. >> reporter: in the u.s., pacific purple sea urchins have destroyed more than 95% of kelp forests from san francisco to oregon. a company called urchinonics is

capturing the creatures and selling them to sushi and seafood restaurants looking for new recipes. a worldwide effor

now an act of kindness. taylor made for a sailor who was part of america's greatest generation. steve hartman found this story. he's on the road. >> reporter: it was just another day at causeway alterations in dunedin, florida, when out of the blue this elderly man walked in. >> morning! >> reporter: and asked if someone could make him a navy uniform. why does a 97-year-old need a navy uniform? >> i loved the uniform. i loved my country, and i'm so help me, i was able to serve. >> reporter: is this you? >> that's me, yeah. >> reporter: joe hall served in world war ii as a navy petty officer first class. is that your ship? >> yeah. >> reporter: he was on a destroyer escort, where he made some of the best friends of his

life and lost a few too. they're all gone now, which is why joe wanted that uniform, for when he sees them again. susan williams is the seamstress who waited on him. >> i've made everything from underwear to wedding dresses. but to have a world war ii veteran come in and say i want to be buried in my uniform, i was like this man is not leaving this store without me making this uniform, because it's the most important thing i'll ever do my life. and it became a strong obsession of mine to make it right. >> reporter: for the next three week, susan poured herself into this project, biengd every seem, satin-lined cuffs, button holes by hand. she spent at least 100 hours. >> i lovr: arg alm ing. >> oh, beautiful! >> reporter: joe actually got but came back in to try a orequ. he bothered. >> i feel like i'm back in the service! >> reporter: in fact, even

though he wanted this for his death, you get the sense that now it's what he lives for. >> can't beat it, right? i wanted to be with my friends, be a part of them. and this uniform kind of brings them close to me, you know. >> reporter: they say the suit makes the man, but not in this case. joe hall was a loyal friend seven decades before he got these dress blues. he just needed someone to sew his heart to his sleeve for that long-awaited reunion. >> you've done a wonderful job. >> thank you. >> reporter: steve hartman, "on the road" in dunedin, florida. >> and that is the "overnigh news" for this tuesday. for some of you, the news continues. for others, check back later for "cbs this morning," and you can follow us online any time at cbsnews.com. reporting from the nation's capital, i'm jeff pegues. ♪

it's tuesday, july 13th, 2021. this is the "cbs morning news." vaccine warning. the fda says the johnson & johnson shot could be linked to a rare disorder. how it attacks the nervous system and the number of people affected so far. there is nothing special about this special session. this is a suppression session. >> texas revolt. democrats leave the state to block a voting restrictions bill. how long they plan to stay away. confrontations in cuba. president biden weighs in on the historic mass protests on the island nation.