Motorists should avoid Swan Gate Nov. 4 Published Nov. 2, 2010 By Airman Saphfire D. Cook 355th Fighter WIng Public Affairs DAVIS-MONTHAN AIR FORCE BASE, Ariz. -- Drivers entering DM Nov. 4 are asked to avoid Swan Gate due to the National Disaster Medical System Exercise being conducted from 8 a.m. to 2 p.m. Motorists are asked to use alternate gates between 8 a.m. and 12 p.m. A high number of exercise participants will be entering Swan Gate throughout the exercise, and the detour is suggested to avoid traffic congestion and exercise interruption.