cbs news asia correspondent ramy inocencio has covered this from the start. >> reporter: one year agoweek, more than half a million hong kongers hit the streets. their anger targeted chief executive carrie lam and a controversial extradition bill. their fear? it would give beijing the power to disappear people in hong kong into china's opaque legal system.cb wasfirser bul and teartrators. we have just been tear gassed by police. you can see those bullets are hitting the people we were in a group with just now. protestors shoved an umbrella in my hand, a helmet on my head, and washed the burning chemicals from my eyes. protestors stormed the legislature on the symbolic date of july 1, the 22nd anniversary of the date the u.k. handed its former british colony back to china. you can see straight ahead, there is this black and white banner that says "no rioters, only tyranny"-- tyranny here of the government. hong kong's summer of discotdevs gang attack on demonstrators in a subway. police brutalizing protestors. clashes that shut down hong kong's airport. with tension made even worse aft

norah. >> o'donnell: ramy inocencio, thank you. new study finds in parts of the u.re face sks are mandatory, as many as 450,000 cases of coronavirus may have been prevented. that as new research shows improving ventilation significantly lowers how long the virus stays in the air. here's cbs' dr. jon lapook. >> reporter: tonight, a major tool in the fight against coronavirus could be right inside our homes. experts say crack a window, open a door. that's because the virus can float indoors. whuge, droplets containing virus can travel, larger ones usually up to about six feet, but smaller ones, particles called aerosols, can float invisibly through an entire room and can be produced through normal speech. >> the zinger for this virus is that basically the aerosols beter: kimbeh spent her carr stg aerosols. ea taiit opens up the number of people who nfecte. >> reporter: aerosols, as shown here, can help explain events like a choir practice in washington state in march where one person likely infected 52 others. >> we're not recognizin

so america should take serious concern about the whole world. >> reporter: ramy inocencio, cbs news,yo. >> yuccas: wise words. next on the cbs weekend news, a young cancer survivor beats the odds, then takes off with his dad. then takes off with his dad. in my line of work, i come face to face with a lot of behinds. so i know there's a big need for gas-x maximum strength. it works fast. relieving pressure, bloating, and discomfort before you know it. so no one needs to know you've got gas. gas-x it would be for me to discover all of these things that i found through ancestry. i discovered my great aunt ruth signed up as a nursing cadet for world war ii. you see this scanned-in, handwritten document. she was only 17. knowing that she saw this thing happening and was brave enough to get involved and do something- that was eye opening. find an honor your ancestors who served in world war ii. their stories live on at ancestry. ...with air wick essential mist. nature... who served in world war ii. with kits starting at just ten dollars you can transform natural essential oils into mist at

ramy inocencio has the story. >> reporter: tonight, parts of beijing under lockdown again. officials there calling it war-time mode. schools closed, transport in and out of the city shut down. there are now more than 100 coronavirus cases linked to market. authorities moved quickly, putting barricades around the area. health officials are launching a massive testing campaign targeting workers, visitors and anyone they came contact atn top of the 90 lef arby. lo cy of more that 22 million. massive housing blocks with food dlifies going no further that perimeter roadblocks. i'd be lying if i said i wasn't worried said this woman. there aren't as many people on the subway. it's the unprecedented lockdown of wuhan in central china in january where an estimated 35 million people were impacted after the first coronavirus was found at a food market. they say the next few days will be critical in understanding how the virus spreads. >> it will also help understand what effect in wuhan environment in the environment may be survival for along time. >> beijing officials are barring re

for "cbs this morning," ramy inocencio, tokyo. >>> thanks. pay attention because we may to be done with corona but corona isn't done with us. time >> announcer: this portion of "cbs this morning" sponsored by ford, built ford proud. it's why at moment's notice we can take american ingenuity and our manufacturing capability and put it to work. building respirators, ventilators and face shields. building what we've been building for over a century. an unbreakable connection between the ford motor company and america. i wanted my hepatitis c gone. an ui put off treating mine. epclusa treats all main types of chronic hep c. whatever your type, epclusa could be your kind of cure. i just found out about mine. i knew for years. epclusa has a 98% overall cure rate. i had no symptoms of hepatitis c mine caused liver damage. epclusa is only one pill, once a day, taken with or without food for 12 weeks. before starting epclusa, your doctor will test if you have had hepatitis b, which may flare up, and could cause serious liver problems during and after

ramy inocencio spoke with the dalai lama this morning.y. >> reporter: the word is enlightening. this was my first time. very excited to speak with him for 90 minutes total. we distill this down for you this morning. he is safe and isolated from coronavirus in northern india at his residence there but technology definitely shortened that distance between here and tokyo. we talked about compassion. we talked about racism in the united states. and we also talked about president trump. while buddhist followers spin pray wheels to accumulate good car marks high in the himalayas of northern india the dalai lama lives and prays. his message of compassion and altruism is unchanged on the eve of his 85th birthday. his holiness stays social from a distance. what is a day in the life of the dalai lama during the coronavirus pandemic? >> not much differences. as a buddhist practitioner, mind is more important than physical. >> reporter: isolation is not new for the dalai lama. he fled tibet in 1959 after china invaded and annexed his country. he's li

ramy inocencio, cbs news, tokyo. >> garrett: next on the "cbs weekend news," two strangers met on a plane, with no idea how >> garrett: we end tonight with a chance encounter on a plane, that lead to a conversation about race, with lessons for all of us. here's cbs's kris van cleave. >> reporter: sth attendant jacque rae hill had a lot on her mind as she prepared for a flight from dallas to panama city. it was the morning after the first night of protests. >> anybody that is paying attention right now can say it is heavy. it is hard. >> reporter: she noticed a passenger holding "white fragility," a book urging white americans to have uncomfortable conversations about race. so, hill asked him about it. >> he picked it up and showed it to me. he said, it really talks about how it is really our fault, and we need to start the conversation, and, and, because that's the only way things are going to change. and i'm like... and then i just start crying. it was just so emotional for me, because i felt understood. >> reporter: what did it feel like, that moment where you feel like you're being hea

for "cbs this morning saturday," ramy inocencio, tokyo. >>> there's a lot more news ahead. for your weekend. ♪ >>> it was an act of kindness during ireland's darkest hour, and more than a century and a half later as the pandemic rages on shores, it's a debt that's being repaid. the little-known bond between the irish people and native americans is next. you're watching "cbs this morning saturday." tremfya® helps adults with moderate to severe plaque psoriasis uncover clearer skin that can last. in fact, tremfya® was proven superior to humira® in providing significantly clearer skin. tremfya® may increase your risk of infections and lower your ability to fight them. tell your doctor if you have an infection or symptoms or if you had a vaccine or plan to. serious allergic reactions may occur. tremfya®. uncover clearer skin that can last. janssen can help you explore cost support options. are made with farm grownal apples as the first ingredient. and key nutrients you want. so you can have a daily multivitamin free of stuff you don't want. one a day natural fruit bites. a new