droplets the aerosols they can be made visible when the person inhales the carrier liquid from an isa garrette and blows it out. the exhaled cloud is comprised of aerosol particles and is now visible as much to us and demonstrates himself by singing oh out there singing speaking even just breathing now and expanding these 2 kinds of droplets when we talk the larger particles fall to the ground after about one and a half meters. but what about when we see. that much turning of the particles behaves differently there are some light that they turned up in the air stream the researchers want to know if and how they do this when we're singing to me. as a boy he did these particles go how do they spread out if i were infected what risk would i pose to the person next to me or indeed the audience those are the questions we want to answer here now. the preparations for the experiments are now complete. that won't stand 10 professional choir singers are invited to take part in 10 different tests in 2 different test rooms. about. each. as michelle i'm amazed by how far these gases that have been inhaled

garrett still faced multiple surgeries and painful rehab. he was back at work as a personal trainer at the gym he owned. and that's where he met isa>> she was also a client of mine that i was the personal trainer to. so while we were first training she said, you know, i really like you, i'd like to date you. and i said, i have a rule, i don't date clients. >> so isa quit the gym. >> and she came back saying, i'm not in your gym anymore, i'm not your client, so let's date. >> they married in december of 2002. two years after the shooting. maybe the happiness brought along by garrett's second wife made it easier to get along with his first, claudia. the anger that had marked their divorce had faded. >> went back to my visitation schedule again, went back to shared custody, and we're on speaking terms again and actually friendly. >> it was about 18 months after garrett was shot when detectives got that lucky break. in an unrelated case san bernardino police served a search warrant on a car belonging to a man named miguel quiroz. they were looking for drugs, but they found something else. under the spare tire. in quiroz's trunk. it wa