Sgt. Duane A. Peppel, scout team leader 4th Light Armored Reconnaissance Battalion, 4th Marine Division, scans the horizon during the final stages of exercise Trident Juncture 15 in Almería Spain, Oct. 28, 2015. The simulated training taught the Marines each other’s strengths and weaknesses, allowing them to seek improvement as well as build interoperability among the warfighters.