In call of duty modern warfare 2 if you get harriers with stopping power then use one man army to swap to a class which has danger close pro as its perk will the harriers get the added damage bonus

No, because danger close pro only improves the explosion of a weapon, and as far as I'm concerned that harriers only shoot high cal bullets, not explosives. On the other hand, stopping power pro (and i pretty sure) can increase the damage of helicopters and pave lows.