Hacking SCADA for terrorism and destruction
SCADA scares me, and I've seen enough things on the Internet to be desensitized to many things, but attacks against SCADA threaten our national security in a very real and topical way by attacking power grids, water treatment plants, nuclear plants, etc. Hacking networks that SCADA devices reside on and using that access to interact with the SCADA system is nothing really new, it's been covered in the media quite a bit...