Soldiers assigned to the 3rd Infantry Division complete a brain teaser before they can move on to the next portion of the Command Sergeant Major’s “surprise” physical training challenge during Marne Week at Bagram Airfield, Afghanistan, Nov. 14, 2017. The event consisted of a mix of mental and physical challenges that forced soldiers to work together to complete. Marne Week is an annual, week-long competition hosted in honor of the 3rd Inf. Div.’s birthday. This year is the unit’s centennial. Army photo by Sgt. 1st Class Ben K. Navratil