For the first time in U.S. history, our youngest generation is expected to live a shorter life than their parents as a result of childhood obesity. Lisa Ling meets families who are struggling to help their children lose weight in order to survive. Check out the videos from this episode:

Generation XXL: 4 Years Old, 101 Pounds

Generation XXL: A 12-Year-Old's Struggle with Morbid Obesity

Deleted Scenes: A Mother's Family Food Makeover

Deleted Scenes: Weight Loss Camp in Georgia for Obese Teens