U.S. Air Force Tech. Sgt. Mark Mize, a squad leader from the 136th Security Forces Squadron, Texas Air National Guard from Naval Air Station Fort Worth Joint Reserve Base, Texas, and his therapy dog, Sully, welcome families arriving for Snowball Express 2015 at Dallas-Fort Worth Airport, Dec. 12, 2015. Snowball Express is an organization dedicated to the children of military members who have died while on active duty since Sept. 11. (Air National Guard photo by Tech. Sgt. Vanessa Reed/released)