Sparky the Fire Dog, National Fire Protection Association, dances with volunteers dressed as popular superhero characters during the 2016 Parents and Children Fighting Cancer Christmas Party at Joint Base Andrews, Md., Dec. 10, 2016. Hangar 3 was transformed into a winter wonderland-theme for approximately 45 military families to enjoy refreshments, performances and spend time with their favorite superhero and princess characters. Santa and Mrs. Claus also stopped by to deliver presents to the attending families. (U.S. Air Force photo by Airman 1st Class Rustie Kramer)