A powerful special report on children who live and work on the streets. The UN estimates there are 100 million such kids, seven million of them in Brazil. On her recent trip to Brazil, Kim Lawton met and followed a British Christian who is spending her life trying to rescue some of those children.

"People often ask me how our stories come together. The "Street Children of Brazil" story in particular had many logistical complications, and we had to work hard to pull it off."