You'll start unarmed, in a room with two guards. Don't pick up your PP7 from the table, instead, attack one guard by slapping, and then dodge behind the other and slap him. The one on the right has the key to exit the room.

Outside the room, turn right, and you'll meet a standing guard. Rush in, and slap. Head up the stairs, and turn left along the offices. Any guards you meet, be sure to slap and not shoot.

At the end of the hall, open the door and you're in this room. Hurry across to those double doors. Once through there, make a hard right, and open the single door, to the right of a set of double doors.

Natalya is in that room. Just open the door so she sees you, then take off. Turn right around, and through these double doors, watching for a guard. You can shoot him if it's easier than slapping.

Through the doors, and down the stairs. Head for the door along the wall at the bottom of the stairs. Go through it, and head left. You'll go by some book cases...

...And then to this door. Open it, and also go through the one behind and to the left to meet Mishkin. DO NOT fire your gun in the presence of Mishkin. He'll pull his gun, and not give you the key...

Once Mishkin is done with the chit chat, he'll hand over the key to the safe, where you can collect the flight recorder (black box). Exit through the door opposite the safe, NOT the one you entered the room with. Turn left out the door, and through this hall.

Through the door, and to these windows. Shoot out the windows, and hop out. Mission Complete.