Call of Duty: Modern Warfare 2/Breach & Clear

Walkthrough
Breach the first room paying careful attention to the enemy to your left who will try to knife you. After killing all the enemies you can see, go to the wall on the right, look up at the balcony and kill the three enemies. Now go to the middle of the room to see if any enemies have entered then go the the left hand side and kill all enemies on the balcony. Now go to the second room and get your grenade launcher out, about 4 enemies with riot shields will appear, kill one, take the shield and retreat to the first room, after bashing the rest of the enemies on the ground, rush to the exit.