The Army is planning to retool its combat aviation brigades by altering some of the units' combination of aircraft and by adding drones. The aim is to convert all of the brigades to the “medium” combination of aircraft, which Kelly Pate, Army public affairs officer at Fort Rucker, Ala., said allows the commander “maximum flexibility.” Aviation brigades fall into three categories: — Heavy: Two AH-64 Apache attack helicopter battalions, one UH-60 Black Hawk assault battalion and one CH-47 Chinook support battalion. — Medium: One AH-64 Apache battalion, one OH-58D Kiowa reconnaissance squadron, one UH-60 Black Hawk assault battalion and one...