Cutscene: In the interrogation room, Blackburn explains that they knew Al-Bashir was in Tehran, which is why they were sent in. It is revealed that Blackburn is under arrest due to him allegedly having killed his CO. The interrogators ask him how he found the nuke in Tehran.
Listen to the radio chatter, then follow Matkovic down the hill. Follow the prompt to set up the mortar. Interact with your squadmate to climb over the wall, then follow your squadmates downhill, turn right and take out the enemies. Follow your squadmate up the stairs, take out the enemies, go forwards and take out the machine gun nests. Proceed up the hill, follow the wall on your left, go up the stairs and wait for the door to open, then head inside.
Follow the corridor forwards and turn right, and interact with the door to breach it. There will be a quicktime event to force the door open. Follow the corridor and breach the next door. Kill the enemies here and continue forwards and out into the alleyway. Interact with the vehicle to climb in.
When you regain control, head down the road to the marked point. Follow your squad forwards and to the left, up the stairs and under the bridge. Enter the building, follow the corridors and head up the stairs. Follow your squad through the door and take out the enemies on the bridge ahead. Follow your squad to the end of the bridge to the marked point and interact with it to climb up. Proceed forwards, killing enemies as you go, then when the tank appears follow your squad into cover and into the building.
When you regain control, follow your squad through the corridors and out onto the street. Follow them across the street and head up the stairs, taking out the enemies camped here. Pick up the RPG, lock onto the tank nearby and take it out. Another couple of tanks will then approach, so take those out too. Follow your squad across the road, around the building, and then up the stairs.
Follow Matkovic down the side of the building and take out the enemies here. Interact with Matkovic to climb over the wall, then stand under the ladder to boost him up to it. Follow him up when he lowers the ladder. Follow the prompt at the end of the walkway to jump through the window. There will then be a quicktime event. Knife the enemy in the doorway then take out the enemies down the corridor. Proceed to the left, around the walkway, and down the stairs. Take out the enemies in the area below then regroup with your squad.
Head down into the basement and follow the red carpet to the elevator shaft. Interact with Campo then follow the prompts to rappel down and throw a flashbang. Take out the enemies in this room and then proceed to the gate. Head through the gate and then into the vault. When prompted, interact with the box to help open it.