On the level POWs in Baghdad, Right after you start out pick up all the stuff on the table. DO NOT I repeat DO NOT go out of the hole yet. There will be 2 gaurds coming in from the doors in front of you. Take out the Phereios grenade and throw it when the doors open. You will outomaticlly kill the first gaurd and maybee the second gaurd. If the second gaurd does not die shoot him with the pistol or slice him with the knife. Then, a third and fourd gaurd will come just shoot them and same with the fifth and sixth. Then, on the right side of the desk is a 570 combat shotgun. It will cost you most your health but it is worth it.