How to stop detection from Security cameras 
with one bullet:

Go to the water tower once you have killed 
two guys in the communications room

Turn off the cammeras in the next room and 
go up the water tower (using the computers 
and the "shift" key)

Kill the guy (he shouldn't see you, just 
sneek up and knife him from behind for fun).

Get his gun and use the scope to find all the
camers (you will want to turn the alternate 
fire key to "right click") (this way u can 
use the scope by clicking "right click" and 
use page up or down to zoom in and out).

Then simply track down the cameras and one 
shot from the sniper rifle should blow them up 


This way you only have to go back into the 
room were you turned off the camers first time, 
do it again and go around shooting them with 
any other gun to blow them up.


by unknown