Dec. 21, 2015, will always be remembered in the storied history of the Office of Special Investigations, as the date six OSI and Security Forces Airmen made the ultimate sacrifice on behalf of the Nation. For nearly 20 years, everyone assigned to Task Force Crimson worked to safeguard Bagram Air Field, Afghanistan and the surrounding area. On June 7, 2021, OSI paid special tribute to its Fallen Heroes and all who served at TF Crimson with the official End of Mission announcement.