November 6, 2011 10:38 am Hundreds Walk Around National Mall for Lung Cancer Research Lungevity holds a 5K walk to benefit lung cancer research. Local 2:21 Family honors boy with foundation to find cure for rare form of cancer 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