Perimeter Check Air Force Senior Airman Cullen Thomas and Klepa, a military working dog, check the perimeter of Nigerien Air Base 201 in Niger, Dec. 9, 2018. SHARE IMAGE: Download Image: Full Size (3.78 MB) Tags: Air Force Photo By: Air Force Staff Sgt. Daniel Asselta VIRIN: 181212-F-UN842-791C.JPG Photo Gallery