U.S. Air Force Airman 1st Class Jovonte Slater, 28th Security Forces Squadron response force member, holds a pen at his partner’s eye-level while practicing a field sobriety test at Ellsworth Air Force Base, South Dakota, March 27, 2024. One of three parts of the field sobriety test, the Horizontal Gaze Nystagmus Test has the participant track the tip of a pen with their eyes while keeping their head still, allowing the administrator to track eye movement. (U.S. Air Force photo by Airman 1st Class Brittany Kenney)