WASHINGTON - While there has been progress against child obesity in the U.S., government efforts to do something about it remain underfunded and there's no way to tell what programs actually work, the Institute of Medicine, one of the nation's leading scientific advisory groups, said on Wednesday. The need for action is clear. By the end of the decade, it's projected that one in five American children will be obese. Currently, 17.1 percent of children and youth are overweight, an increase from 16 percent in 2002. At least one program that succeeded just lost its federal funding, the IOM experts...