U.S. Air Force Senior Airman Brandon Troglia, 409th Expeditionary Security Forces Squadron Response Force team member, conducts building clearing procedures during a close quarters battle refresher course at Nigerien Air Base 201, Niger, Feb. 5, 2020. During the course, the Defenders brushed up on the fundamentals of weapon manipulation, room clearing, and engaging threats with bystanders and hostages. (U.S. Air Force Photo by Tech. Sgt. Alex Fox Echols III)