Childhood obesity is a growing problem in this country-- nearly one out of five American children is overweight.

Convincing kids to eat right can be a battle. And some critics say the food industry has turned it into an unfair fight.

Tonight, the food industry fights back... as Dateline explores America's love/hate relationship with food ... and why we eat so much.

Click here for a special subsection. Click here to see preview videos of kids and how they recognize brand logos, and how they're swayed by cartoon characters on their food.

Tonight at 8 p.m./ 7 Central on Dateline.

One was a young prosecutor... green, but a go-getter. The other, a savvy detective with a creative approach to criminal investigation.

Together they were willing to do almost anything -- this side of the law -- to find out what happened to her... and to bring those responsible, to justice.

Join us for "The Mystery of Katrina Montgomery."

The suspect was an American grade school teacher looking for work in Thailand.

In his words, the death of the 6-year-old was an accident but he claims he loved JonBenet.

But how credible is his confession? Is this really the man behind the brutal killing?

After a decade of dead-ends, there are still more questions than answers about JonBenet's murder on that day after Christmas.

A special two-hour Dateline Saturday Night, starting at 9 p.m./ 8 Central, on NBC