Army Reserve Sgt. 1st Class Robert Isom demonstrates how to high-step through an obstacle as part of a team-building confidence course on Fort Jackson, S.C., April 12, 2015. Isom is an instructor-trainer assigned to the 3rd Battalion, 321st Regiment, 108th Training Command. Army Reserve Sgt. 1st Class Robert Isom demonstrates how to high-step through an obstacle as part of a team-building confidence course on Fort Jackson, S.C., April 12, 2015. Isom is an instructor-trainer assigned to the 3rd Battalion, 321st Regiment, 108th Training Command. SHARE: Download: Full Size (8.55 MB) Tags: Photo Essays Credit: VIRIN: 610087-F-DNZ76-117.jpg Photo Gallery