some schools are now banning chocolate milk blaming it for attributing to the obesity epidemic in america. here is deborah roberts. >> reporter: it was once the sunny spot in a kid's dreary day. >> the wonderful chocolaty taste. >> reporter: ah, the magic of chocolate milk. that was then, this is now. with close to a third of u.s. kids overweight, nutritionists, parents and even the first lady with her let's move campaign -- >> they're good. >> reporter: -- are waging a war on childhood obesity. and the latest battle is in school lunch rooms over chocolate milk. >> as far as i'm concerned, chocolate milk is soda in drag. >> reporter: dietary experts like ann cooper say forget claims about vitamins and calcium. 70% of milk sold in most school cafeterias is flavored and loaded with sugar and fat. >> it's just like saying, listen, kids don't have enough fruit. they don't like apples, feed them apple pie. >> reporter: in an effort to reach a truce, some schools are turning to new versions of the old favorite such as chocolate milk made with less fat and less