Napalm Riot

I thought Ghost Town was going to be ridiculous on hard but it was actually pretty manageable. My friends was over and we were gonna play some BC online and I was just playing Ghost Town while he had Taco Bell and I decided to take on the final helicopter with the laser designator to see if I could get the 1 in a million achievement... Anyway long story short it seems when you use the designator that the helicopter is actually spending more time evading then firing missiles so you take no damage... So it took me about 15 minutes to finally hit it with the laser designator... But I still needed to slam it with two more rockets to drop it.