April 2, 2015 - After 85 rounds were fired from the modified howitzer, a Soldier from the Presidential Salute Battery (PSB), 3rd U.S. Infantry Regiment (The Old Guard) renders a hand salute. This demonstration severed multiple purposes. While keeping the Soldiers of the PSB trained and proficient, it also served as an opportunity to showcase their very specific skill set to all in attendance. (U.S. Army photo by Sgt. 1st Class Nicolas Morales)