D-M to hold operational readiness exercise Published Dec. 8, 2014 By 031214 DAVIS-MONTHAN AIR FORCE BASE, Ariz. -- Davis-Monthan AFB will be conducting a routine operational readiness exercise Dec 9-12. Please be advised there will be increased activity on the base during the exercise, to include 24-hour A-10 flight operations. During the exercise period, alarms, sirens and loudspeaker announcements may be heard at residences on and near the base. The A-10s will be supporting a combat search and rescue component of the exercise taking place southeast of Davis-Monthan, and will be taking off periodically throughout the night. These exercises are held to ensure D-M's Airmen maintain the highest levels of proficiency and readiness for worldwide military and humanitarian operations. For additional information please contact the 355th Fighter Wing Public Affairs Office at 228-3406, or for noise concerns please call 228-5091.