LUKE AIR FORCE BASE, Ariz.
Airman 1st Class Demetrius Smith, 56th Civil Engineer Squadron heavy equipment operator, drives a street sweeper along perimeter road at Luke Air Force Base, Ariz., Jan. 5, 2015. Street sweeping, heavy equipment movement and excavators for trenches are utilized to assist various jobs around the base and 56th CES. (U.S. Air Force photo by Senior Airman James Hensley)