Hackers penetrated computers at alcoa, westinghouse, and solar world. the stolen information invaluable. for example, by allegedly hack u.s. steel, the chinese spies learned to manufacture steel more cheaply causing world steel prices to plunge. then u.s. steel saw its profits plunge and was forced to cut production and layoff workers. >> there's only two kinds of corporations, big corporations in america, those who have been hacked by the chinese or those that don't know they have been hacked by the chinese. the amount of theft going on is staggering. >> reporter: the fbi director pointed to ...