U.S. Army Lt. Col Perry Stiemke, commander 92nd Engineer Battalion, 20th Engineer Brigade, speaks during a deployment ceremony at Joint Base Langley-Eustis, Va., Jan. 24, 2018. The 74th Dive Detachment conducted several field training exercises and small diving missions to prepare for an upcoming deployment in support of Operation Spartan Shield. (U.S. Air Force photo by Senior Airman Derek Seifert)