The 21st Cavalry Brigade will be conducting training of Apache helicopter units from July 25 through August 10 in the Mason County and surrounding area.The training will consist of numerous helicopter flights at various altitudes, and will be conducted during both day and night. The commanders of the exercise have assured local authorities that every effort will be made to avoid buildings, livestock, etc., during the conduct of their training.Most of the training will be in Mills, Brown, McCulloch, San Saba, Coleman, Runnels, Concho, Mason and Menard Counties. These same counties will also have numerous military convoys moving about on primary and secondary roads during the same time period in support of the missions.The most extensive convoys will be at the beginning of the exercise (July 24-25); and, again at the end, (August 10-12). Most of that traffic will be from Fort Hood to Brownwood's Camp Bowie; and, then, from Camp Bowie to Brady's Curtis Field.There will be numerous military and civilian vehicles participating in this training. Many of them, along with the associated personnel, will be displaying mock weapons. There will be no live weapons or munitions used during these exercises.Anyone having any inquiries or concerns during the exercise may contact the Airspace Manager at Fort Hood, (800) 841-5792, or (254) 288-1424.