I am having trouble with the level where I am searching the house. The objective is to search the house... FOR WHAT!! I can not find anything. What am I looking for? There is a jeep in rage of a wicked machine gun, but what am I supposed to do/find in the house now? I can not go anywhere out side and I have not been able to find keys or anything. There is one door upstairs that will not open. Any suggs??