Airman 1st Class Matthew Pfeffer, 36th Airlift Squadron loadmaster from Yokota Air Base, Japan, ties a knot on a bundle in preparation for a practice drop at Operation Christmas Drop 2018 at Andersen Air Force Base, Guam, Dec. 6, 2018. In its 67th year, OCD is the world’s longest running airdrop training mission, delivering humanitarian assistance to islands throughout the Pacific. (U.S. Air Force photo by Senior Airman Matthew Gilmore)