MISSION OBJECTIVE: TRACK DOWN IRENA AND KILL HER
Head through the door and go upstairs and through the door at the end of the hall. Have your team go through the double doors and clear the room, head through the other door and give them some support from the other side. Head through the opening and kill the terrorist here then into the next room and kill the terrorists on all levels. Go up stairs and follow the corridor round towards the marker. You'll come to a corridor with two doors. Have your team stack up on the first door and flash and clear and you go through the next door and kill the terrorists. GO down the stairs and kill the remaining terrorists. Re-supply at the supply crate then have your team stack up on the door and you go to the door on the left. Order your team to frag and clear then head in and kill all the terrorists. Then order your team to hack the computer and protect them as more terrorists attack.
Go up the stairs and you'll see Irena in a room but you can't shoot her, head round and wait for the blast doors to open then go through and round the corridor. Clear the room on both levels and head up the stairs and kill Irena then jump in the elevator.