Call of Duty: Modern Warfare 2/The Pit

Description
'''Clear all of the enemy targets as fast as possible. Shooting civilians will prevent you from getting 3 stars.'''

Walkthrough
This level is fairly easy to do solo. It is exactly the same as 'The Pit' in S.S.D.D. If you can complete this level with 3 starts then you should be able to get the Pit Boss achievement. First swap to yuor USP Pistol, then complete the course using these steps:

Position 1
Shoot the first three targets then continue on to position two.

Position 2
There will be a civilian in front of one enemy and one enemy to the right. Wait for the enemy to move, then shoot both targets and continue.

Position 3
Shoot the enemy target in front of you, then look upstairs. Take out the enemy on the right first then the one on the left. Finally take out the target in the middle window. As you're running towards the final target at the door, reload, then knife the target to the left.

Position 4
There are two enemies to the right and one straight in front of the door. Go forward and get the one in front of the door, then turn right and get the other two. Reload again, go up the stairs and knife the target.

Position 5
There are four targets and two civilians, so shoot all four enemies, (you can align both shots, so one shot takes down two of them). Then reload and go down to the next and hardest area.

Position 6
Shoot the one enemy target to the right, then get to the right of the car. When you are there, you can shoot two enemy targets at the same time. There is one final one to the very left then continue.

Position 7
Shoot the two final targets then sprint to the finish.