Children of Grand Forks Air Force Base, N.D., brave the brisk morning air to participate in National Walk or Ride to School Day Oct. 8, 2014. National Walk or Ride to School Day was established to promote physical activity and street safety to young children. Children are encouraged to walk to school or ride their bike with adult supervision to learn these important lessons. (U.S. Air Force photo/Airman 1st Class Bonnie Grantham)