The Agency's equipment recommendation. The only necessary piece of equipment is the R93. If you don't take your target out with one or two sniper shots, you will probably fail.
A map to the elevator that goes up to the roof, classic sniper's position.
The elevator.
Waiting for the Red Dragon negotiator...
Unpacking the R93...
It's a tight shot. The Blue Lotus negotiator who was partially blocking my shot, fled the second the Red Dragon member fell. Try to hit the Red Dragon negotiator in the head or square in the chest. If you only maim him, he will run to his car and the mission will be a failure.
They send an attack helicopter for you! The gunner is armed with an M60. You only need a few shots to take him out, but he needs only a few shots to take you out and he can fire a lot faster than you can so you need to be precise. If you're feeling bold, go for it. If you're not, run to your car!