Trick or treat!
Jordan, left, and Christian Madden, sons of U.S. Air Force Staff Sgt. Sarah Madden, 319th Medical Group, show off their costumes at the clinic on Grand Forks Air Force Base, N.D., on Oct. 31, 2011. The 319th Medical Group hosts trick or treating every year as a way for children and families to enjoy the holiday. (U.S. Air Force photo by Airman 1st Class Xavier Navarro)