Sgt. Curtis Carlin and Sgt. Alek Davis of the 487th Engineering Detachment (Firefighters), US Army Reserve, Fort Des Moines, Iowa, push toward the halfway point during a 5K run at Novo Selo Training Area (NSTA), Bulgaria, on July 21, 2017. The detachment’s primary mission is to provide primary fire protection for the base, and has been rotating between NSTA and another base in Romania since December 2016. (US Army photo by Master Sgt. JD Phippen)