nichelle medina has a look. >> these drones could be valuable in sports.ying machine to spray covid disiinfect ent. a number of businesses are embracing technology. this robot at hong kong international airport sprays disinfect endened used u.v. light. at pittsburgh international airport this machine is equipped with u.v. technology. so is this robot that a company in belgium is building. this mall in thai lapd has a robot that mop tors shoppers by taking their temperature. and in south korea smart machines with serving coffee. the robot creates some 60 different kinds of drinks. tables are placed at a distance and an ah top muss card is used to deliver the order. no human workers planned. they plan to open another 30 cafes in south korea in the coming months. nichelle medina. >> one low-tech device used to keep us safe, facemasks, can also cause problems. naomi ruccum spoke to the experts. >> reporter: across the country health workers are sharing photos like these showing whack happen after wearing a mass. >> these bumps around our masks, breakouts aroun

nichelle medina, cbs news, san diego. >>> "cbs this morning saturday" will be right back. ♪ ["i got youiara] ♪ it all can get so out of control sometimes ♪ ♪ you can lose your faith ♪ you can lose your mind ♪ lose your grip ♪ get stripped of your pride ♪ till you don't know how you're gonna stay alive ♪ ♪ hey, hey i got you ♪ i will give you what you're needing ♪ ♪ i'll be right there ♪ i got your back ♪ i got you >>> welcome back to "cbs this morning saturday." we begin this half hour with the one-year anniversary of fierce anti-government protests in hong kong. the city endured months of unrest as some one million demonstrators filled the streets to stop a controversial extradition bill rallying to a cry of "liberate hong kong." ramy inocencio reports. >> reporter: one year ago this week, 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. cbs news was there when police fired the first