Mission 2 : Brave New World
Shortly into the mission you will be tasked with taking out the helicopter with a rocket launcher.
Looking toward the way you came the helicopter will fly over the bridge, and try to drop off soldiers.
The launcher works the same as a laser designator, You need to keep aiming at the Target to lead the rockets there.
The first helicopter takes 1 hit, and the second with appears shortly afterwards takes two.
As you are looking at the 2nd heli, you can fire 2 rockets one after another, and as long as your laser is on the target it will be destroyed!