In the mission "Reactor" in the Modern Warfare III campaign, you are tasked with taking out 3 helicopters and each helicopter has a unique armament (killstreak) in the general vicinity.
Drop right into the first helicopter and land on the construction platform with supplies. To the left, there will be a self revive, ammo, SAM turret, and more but pick up the Mortar Strike and use it to target the first helicopter.
The second helicopter by the big warehouse with the letter "A" on it will have a precision airstrike at the base of the outside with various other supply materials. Pick up the airstrike and use it on the second helicopter.
Proceed to the roof next to the 3rd helicopter and either grab C4, Semetex/Frag or a RPG (location shown in video) and throw said explosive toward the 3rd helicopter. In the back of the roof, toward the dome is a Stealth Bomber. Use it on the 3rd helicopter for the achievement to pop!
** If the Stealth Bomber doesn't destroy the helicopter fully, there is a bomb drone in the back of the roof on a green crate. Use that to finish off the 3rd helicopter and the achievement will still pop!