Pfc. Carla Santiago and other Signal Soldiers from Company C, 91st Engineer Battalion, 1st Armored Brigade Combat Team, 1st Cavalry Division complete a cardio drill using their assigned weapons before beginning a mental challenge during “Saber Challenge” Jan. 22. The Saber Challenge consisted of a 10-mile road march with six challenge stations along the route. Each company in the battalion fielded a 12-man team for the competition.