Master Sgt. Noriaki Nakaoka, left, and Staff Sgt. Mayu Ito, both 1st Tactical Air Wing 401st Squadron loadmasters, tighten a bundle inside of a Koku Jieitai (Japan Air Self Defense Force) C-130H Hercules during the 66th Operation Christmas Drop at Andersen Air Force Base, Guam, Dec. 13, 2017. OCD is important because if a humanitarian aid or contingency operation in an unfamiliar area arises, the training and experience from this event improves each Air Force’s ability to drop bundles at a faster rate. (U.S. Air Force photo by Staff Sgt. David Owsianka)