This mission is pretty simply a tutorial for the game. You jump into the boots of a jihadist for a change and run through their training course.
There will be a man talking in front of you and the game will prompt you to look around the are and then to move. Once you've mastered these basics, move into the next room and you'll be taught how to duck (tap the button) and crawl (hold the button). Once you've passed the first two obstacles, you'll have to vault over the third.
This will bring you to a shooting range. The first target will be shot like normal. After shooting it once, you will be prompted to switch firing modes and shoot it again. After shooting this target twice, you'll need to press the right stick in (R3) to zoom and then shoot the target to the right. Finally, find the group of three targets to the left and throw a grenade at them when prompted.
After you've "killed" all of the targets, turn left and you'll find another brother there. Hold the reload button to get ammo from him. Wait for him to step out of the way and then go through the door behind him.
You'll enter a medium sized room with a large metal barricade near you and then a large metal structure in the distance. Go up behind the barricade and duck behind it. At this point, you'll have to lean to each side so that you can shoot at the targets on either side of the metal structure. The reason you are leaning is because there is a machine gun that will be shooting at you constantly until you finish. Follow the button prompts on screen to do this.
The Plane
Once the machine gun stops, head through the door on the right side. Follow this path until it leads you to a mock up of an airplane with targets scattered around (creepy). You want to take out each of the red targets without hitting any of the blue targets in this exercise and you want to do it as quickly as possible. Remember that in some cases, it might actually be helpful to move further up so you can get a better angle around a blue target.
The first room is going to have three red targets, one in each of the aisles. Take these out and move through the door at the back middle.
The next room is going to be tougher than the previous one. There will be three more targets in here. Two will be on the right side and one will be in the middle back. There will also be two blue targets (center and left) that may make this a little more difficult to deal with. Try to get to the right side and from here you should have an unobstructed view of the targets. Keep in mind, however, that these targets will actually duck on a timer (they will all duck at the same time). Try to hit one and then when they duck, move to be in the perfect spot to hit both.
Go up the stairs at the back and then turn around to find the next floor. This one is even tougher with four targets and multiple blue targets. This is compounded by the fact that it's really two rooms joined together so you'll have targets to hit but you'll have to move up ahead to actually attack them. They'll also move left and right. You need to be careful because they are going to move in ways that you may shoot a blue target through the red target if you fire at the wrong time.
On the way to the next room is a classic "knife dummy". Make sure you stab it with the melee button and move on to the next room. This room is going to have four targets in the four corners of the room so be careful that you don't go by them without hitting them or you'll have to come back. It's pretty cramped up here so double check your shots before you accidentally hit a blue target.
The last room is just ahead. There will be a door in front of you. Go up to it and activate it to start the "Breach". You'll get to choose how you breach the room though there doesn't seem to be much difference in the results for the most part though some of the later ones may stun the enemies a little more than the first breaches. Breach the room and during the slow motion period, take out the two targets in the next room.
You've officially cleared the plane. At this point, you can return to the plane and try again to see if you can beat your best time or you can go to the right and leave the plane to continue the game.