U.S. Army Spc. Esther Harper-Smith, 1098th Transportation Detachment, 11th Trans. Battalion, 7th Trans. Brigade (Expeditionary) orderly room clerk, hides in tall grass, dressed in opposition force attire, preparing to simulate an attack on the 331st Trans. Company at Fort. Pickett, Virginia. Oct. 29, 2018. Smith waited for the signal to attack before engaging with CS gas. (U.S. Army photo by Spc. Travis Teate)