jim robe robertson. >> interesting stories today.issa, thanks. >>> for you, rio de janeiro may be an exotic destflation but for millions of children that live there, the day-to-day reality is very different from that. this week's cnn hero is showing a way to help change their destiny. >> i have never seen any place as beautiful as rio d se janeir but it does have its dark side. there is violence all over. >> the bad things that happen here are the shootings. >> it's the kids that have it toughest here. >> sometimes i get scared. >> they don't have many options. kids die every day from making the wrong choice, but every time i see, the first thing that comes to my mind is potential. i am a judo olympic medalist but the best part of my life is changing people's destiny through sports. i usually tell the kids that we can't let ourselves get used to the violence that surrounds us. we have to fight back somehow. instead of fighting in the streets, they learn how to use your energy in the right place. >> he helps me win lots of championshi