NPR's Ina Jaffe reports from Los Angeles on California's poor record enforcing federal child support laws and a bill in the state legislature intended to improve collections. Four-and-a-half million children are owed eight-and-a-half billion dollars in overdue support payments. Almost all of them are poor, and many are on welfare. This week, the state assembly passed a reform bill that would take enforcement away from district attorneys and give it to county offices. The state senate is expected to pass a similar measure.