Col. Bill Knight, 11th Wing/Joint Base Andrews commander, thanks the volunteers and event coordinators moments prior to introducing Santa Claus at the 25th Annual Parents and Children Fighting Cancer Christmas Party, Dec. 8, 2012 in Hangar 3 on Joint Base Andrews, Md. The annual PCFC event allows military families whose lives have been affected by cancer to come together and enjoy a free holiday celebration with food, performances, displays and special visit from Mr. and Mrs. Santa Claus. (U.S. Air Force photo/Senior Airman Bahja J. Jones)