What is air support?
Close air support(CAS) is an aerial attack mission flown against enemy ground forces that are attacking or "too close for comfort" to Friendly Ground Forces.
Close Air Support, When Army strong isn't Quite Strong Enough....
air support - video
Air support - what is it?
Back-up from your boss. Help from an executive when getting resistance to an initiative or idea from others -- especially others who outrank you.
I won't be able to get my proposed budget for budgie breeding research wothout air support from the VP R&D.