Sgt. Justin Phifer, of Jackson, Tenn., a section sergeant

Sgt. Justin Phifer, of Jackson, Tenn., a section sergeant with Destined Company, 2nd Battalion, 503rd Infantry Regiment, 173rd Airborne Brigade Combat Team, demonstrates how to put together a Uli Knot Slider Charge July 18, during a demolition class at Tapa Army Base, Estonia. The class was a chance for Soldiers to gain hands-on experience in charge building, which can be used when needing to force entry into a building. (U.S. Army Photo by Sgt. Juana M. Nesbitt, 13th Public Affairs Detachment)