Once you see the prompt, keep pressing the button to struggle and to snatch the gun from Rorke. After this sequence, you'll find yourself with the other captured ghosts. Just in the nick of time, allied sniper fire will take out a few guards which will give you to opportunity to overpower them and fight back.
Once free, pick up two weapons and take out the nearby enemies. Wait for your teammates to get their weapons and follow them to the next room. Kill all enemies and proceed to the kitchen next to find Keegan. Hide in the next room and stay down just as an enemy patrol enters. Follow your teammates once its clear and keep walking until you reach the entrance. Enemies will intercept you so take cover and engage them. Once you successfully taken out a good number of enemies, go downstairs and take cover inside any of the two establishments nearby. Proceed with caution while taking out enemy forces. More enemies will be waiting in the lower ground by the escalators so remain crouched and pick up grenades from enemy corpses so you can easily take out the ones hiding behind cover. Continue downstairs and clear all the enemies to proceed to the next area. There's also a Rorke File nearby.
Continue along the corridor. Shortly after, enemies will pop teargas. Run away from the gas and follow your teammates. Jump through the window. After the scene and getting back to your feet, you'll find Riley. However, he will be wounded by sniper fire so you have to take out the immediate enemies, take cover and get a revenge shot at the enemy sniper on the ledge to the right. You have to carry Riley as you make your way to the extraction point. After clearing the first area, scavenge the weapons and ammo of the killed enemies then carry your faithful K-9 and place behind cover once you encounter more enemy forces. They'll also have a light chopper which you can take down by shooting its occupants and pilot.
Continue engaging and fighting your way through the enemy forces while alternately carrying Riley and engaging enemies. Once clear, pick him up and take him to the evac chopper waiting at the end of the path. Mission complete.
