January 14, 2012 11:16 am From the 2012 Health and Fitness Expo: Antone Davis Antone Davis of NBC’s “The Biggest Loser” joins Doreen Gentzler at the NBC4 Health and Fitness Expo 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