U.S. Air Force Senior Airman Trevor Ronfeld, 19th Civil Engineer Squadron pavement and heavy equipment craftsman, sets down a bunker at Little Rock Air Force Base, Arkansas, Oct. 18, 2019. In preparation for the upcoming ROCKI exercise, which begins Nov. 4, the 19th CES set up defensive fighting positions and bunkers by the flight line. (U.S. Air Force photo by Airman 1st Class Mariam K. Springs)