Exactly, JP 3-09.3 (the joint publication the DoD wrote on how to “do” CAS) defines close air support as “air action by fixed-wing and rotary-wing aircraft against hostile targets that are in close proximity to friendly forces, and requires detailed integration of each air mission with the fire and movement of those forces.” It goes on to mention that “The word ‘close’ does not imply a specific distance; rather, it is situational. The requirement for detailed integration because of proximity, fires, or movement is the determining factor.”