Airmen and spouses perform callisthenic exercises during the McChord Field Fitness Annex's cardio tone class March 9, 2011, at Joint Base Lewis-McChord, Wash. The various weekly classes and services offered at the McChord Field Fitness Annex give service members and families an opportunity to honor National Nutrition Month by meeting routine exercise needs while maintaining a healthy diet. (U.S. Air Force Photo/Airman 1st Class Leah Young)