U.S. Army Sgt. Musa Conteh, from left, Pfc. Tieyu Zhang and Pfc. Oscar Ortiz employ a tactical water purification system at a waterfront in Buchanan, Liberia, Jan. 8, 2015. The purification system provides clean water for forces supporting Operation United Assistance. The soldiers are assigned to the 227th Quartermaster Company, 129th Combat Sustainment Support Battalion, 101st Sustainment Brigade, Task Force Lifeliners, Joint Task Force - United Assistance. U.S. Army Sgt. Musa Conteh, from left, Pfc. Tieyu Zhang and Pfc. Oscar Ortiz employ a tactical water purification system at a waterfront in Buchanan, Liberia, Jan. 8, 2015. The purification system provides clean water for forces supporting Operation United Assistance. The soldiers are assigned to the 227th Quartermaster Company, 129th Combat Sustainment Support Battalion, 101st Sustainment Brigade, Task Force Lifeliners, Joint Task Force - United Assistance. SHARE: Download: Full Size (2.1 MB) Tags: Photo Essays Credit: VIRIN: 272106-G-UZN74-682.jpg Photo Gallery