January 10, 2014 9:24 pm Health & Fitness Expo: Children's National Health System Children’s National Health System parked its doctors-office-on-wheels at the Convention Center and will educate this weekend about asthma. Local 0:55 Halle Berry helps unveil menopause research bill during Capitol Hill visit 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