[Pereira:] Making house calls to the homeless. That's how Dr. Jim Wither spends most of his days and nights.
[Berman:] And as Chris Cuomo shows us, he's taking his makeshift clinic idea worldwide.
[Chris Cuomo, Cnn Correspondent:] For more than 20 years, Dr. Jim Withers has spent his days like this.
[Dr. Jim Withers, Operation Safety Net:] You guys going to stay here or use the shelter?
[Cuomo:] Operation Safety Net is looking for patients.
[Withers:] Do you want a bottle of water? We've seen people out here with all kinds of things that should never be on the street, catheters and tubes coming out of them. Yo, Safety Net!
[Cuomo:] Working in these conditions is rarely easy, but Dr. Jim Withers says turning his back on the homeless in Pittsburgh was never an option.
[Withers:] There were some times when I was kind of scared. I had a guy point a shotgun at me, and I had a guy threaten to cut my throat. But once you get to know people and they become real to you, it's hard to forget them. I dropped you off some firewood.
[Cuomo:] On days like this, when temperatures are below freezing, the stakes are especially high.
[Withers:] When it gets below 15, somewhere in that range, everybody is at risk. So we do extra patrols. Sometimes you sense when a person is giving up, and I found that that is a pretty strong predictor about who might not make it.
[Cuomo:] Withers says the payoff has been worth it. That's why he founded the Street Medicine Institute: to bring his vision to cities across the world.
[Withers:] I think there's just a sense that, if we weren't doing this, there would be no one there for them. And it gives an incredible amount of meaning to everyday work. I wouldn't give it up for anything.
[Pereira:] Simple and impactful. Thanks for joining us at @
[This Hour. Berman:] "LEGAL VIEW" with Ashleigh Banfield starts right after this.