April 23, 2013 1:00 pm Avon Walk for Breast Cancer: May 4-5 Learn more about the two-day fundraising event taking place in the District from May 4 to 5 to benefit Food & Friends and other local beneficiaries. Local 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 3:41 Nail biting: A psychiatrist shares tips