Writing Hell Holes 3: To Hell and Back, which involves taking a nuclear bomb to the Demon home world to destroy the portal complex being used to invade Earth. Spent the last couple of nights researching on the Internet. I have decided on what bomb to use (B61-Mod12), what yield to use (5 kilotons), how to turn it into a man-portable "suitcase" bomb, what the bomb's pre-flight controller (computer) looks like, and how to modify/reprogram it so that it can work as a timed bomb. Very interesting stuff; it's amazing what you can find on the Internet. Think I'm probably going to have that part of the book reviewed to ensure I didn't accidentally include any classified information (just because it's on the Internet doesn't mean it's not classified). Still, realism rocks when writing apocalyptic science fiction!