Airports is a kind of production building and terrain. Airports can produce most kinds of air units as long as the player has enough War Funds (or has met certain conditions during the Campaign). Placing an Air Unit here will allow them to refuel, reload ammunition and repair them, at the cost of some funds. Like all other properties, Airports generate funds per turn, offer a strong defensive cover (3 stars) for land units and do not inhibit movement for any unit.