The Pueblo Chemical Agent-Destruction Pilot Plant team began processing 105mm projectiles on Dec. 11, 2020. These projectiles will be the last munitions destroyed at the main plant, containing approximately 3 lbs of mustard agent in each munition. The 105mm projectiles make up approximately 22% of the stockpile, by agent weight. The remaining stockpile will be destroyed by the Congressionally mandated agent destruction deadline of Dec. 31, 2023.