MINOT AIR FORCE BASE, N.D. – Senior Airman Nicholas Richardson guides the tines of a 10k forklift operated by Steve Zimmy under a concrete barrier during the base’s anti-terrorism exercise held here April 9. As part of the exercise, the concrete barriers are placed at various locations around the installation as an added protective measure. Airman Richardson and Mr. Zimmy are members of the 5th Civil Engineer Squadron. (U.S. Air Force photo by Airman 1st Class Joe Rivera)