Seeing as people are catching on, here ya go...
Given by lester, you require atleast one player with rank 55.
The mission will tell you to go to the parking lot, and then either go to collect the documents, or climb the ladders to get to the rooftop (gunmen and sniper teams, respectfully).
Atleast 1 gunmen must reach the parking lot in order for the green dot to show up, which are the documents.
Although the mission tells you to collect the documents, you can destroy them and still complete/pass the mission.
The quickest way to do it(29 seconds is my fastest time) is to have 3(atleast 1 who is level 60 with a grenade launcher) gunmen and one sniper, the sniper doesn't even need to go to the ladders or anything, he tag along with the gunmen. Everyone but one person drives to the top of the parking garage and throws frags over the wall to destroy the documents/enemies, mission complete - 5k RP, 5k cash.
The level 60 with the grenade launcher? He can make the mission pass alot faster, this is how you can complete the mission in 30 seconds, rather than 1 minute. From the "restart" spawn, there are 2 spots that I like in order to destroy the documents with 2-3 40mm. Directing ahead of you, is a 4-way intersection, head to the road on the right, and stand where the double yellow line hits the crosswalk, and aim towards the parking garage, and aim as high as your character can. This may take time in order for the person with the grenade launcher to get the "sweet spot", but give it a few goes, and you should be completing the mission within 35 seconds.
Another spot, is the tree right across the road. It's hard to explain, but stand on the right side of the tree, and do the same as I previously said with the crosswalk.
*Generally speaking, it takes 4-6 "mission passed" to level up, even at level 60-100.
*There are 2 Ammunations nearby, so stock up on frags and 40mm DURING the mission.
Please credit me if you re-post/make a video.