"Head to the Strip Mine and look for Karen"
Vera advises we search the hangars first of all. There's three of them in total. Head to the closest one first - it should be about 75m away. deal with the few guys outside, then move in and get into cover to take out those guarding the inside. There will only be three or four enemies to take out. Make sure you go right to the back of the hangar, where the waypoint is, or you won't check this one off your list (there's also often a guy hiding back there that you'll want to take out).
Head to the second hangar next, about 150m away. There is a bike around the side of this hangar that you can use to get there. Use the same tactics as with hangar one, killing the enemies outside first, then moving in and firing your way to the back of the hangar. With this one searched and clear, get on your bike and drive to the final hangar.
Repeat what you did before for this final hangar - it's basically exactly the same as the previous two. Unfortunately, Karen wasn't at any of them, so we now need to simply leave the Strip Mine.
This is actually easier said than done, but try to follow the road up higher without falling back down into the mine and you'll eventually find your way out.
Vera suggests we contact E-Man for help in finding Karen.
Reward: G250,000, Respect: 1,080,000