(more off topic) That was a great movie about an Aircraft carrier from today going back in time and they have the option to stop Pearl Harbor from happening. Imagine a 90s Enterprise class fleet versus a 1930/40s Japanese carrier? I might have the names mixed up. This one is about a geek kid designing a bomb out of a soccer ball. The real theory exists and has been tested. It's an implosion device and you could probably google "soccer ball principle".