March 11, 2013 5:46 pm 20th Anniversary NBC4 Health & Fitness Expo Take a look back at 20 years of the NBC4 Health & Fitness Expo. Local 2:54 ‘Healthy moms equal healthy babies': Children's National offers maternal health care 2:14 Opioid crisis: National drug take back day on Saturday 2:55 Concussion treatment: Returning to school and limiting screen time may help, study finds 2:39 What to know about ADHD medication and pregnancy 2:08 How to pick the best running shoes for outdoor exercise