So after a whole day trying to stomach BO2 I've managed about six missions. Never before have I procrastinated so extensively. I did spend some time trying challenges and I've grabbed the majority of what I've available so far.
One problem though. On 'Old Wounds', what do I have to do to destroy 4 choppers in the north pass? I've got there three times now and flaked everything in the air with my stinger but no dice. Do I have to be standing in a specific spot?