First Lady Michelle Obama visits with wounded warriors and their families at the Intrepid Spirit One, a satellite center of the Bethesda-based National Intrepid Center of Excellence, in Ft. Belvoir, Va., Sept. 11, 2013. The center cares for service members and veterans suffering from traumatic brain injury, post traumatic stress and related conditions. Wounded warrior Shenae Mitchell demonstrates a device that targets balance issues.