Snow falls on ammunition cans lined up on the ground as Airmen. Original public domain image from Flickr https://www.rawpixel.com/image/4031980/photo-image-ice-box-public-domainFree Image from public domain licenseAmmo can is filled with 50-caliber shell casings. Original public domain image from Flickr https://www.rawpixel.com/image/3578469/free-photo-image-412th-theater-engineer-command-caliber-shell-casingFree Image from public domain licenseSpent 7.62 mm ammunition casings are collected by Army paratroopers. Original public domain image from Flickr https://www.rawpixel.com/image/4031964/photo-image-box-public-domainFree Image from public domain license