local closestTownscopy = AIList();
		for (local town = closestTowns.Begin(); closestTowns.HasNext(); town = closestTowns.Next()) {
            local closest_town = AITile.GetClosestTown(tile);
            if (closestTowns.HasItem(closest_town) {
			    closestTownscopy.AddItem(town);
			}
		}
		closestTowns.Clear();
		closestTowns.AddList(closestTownscopy);