I've been focused on detecting nuclear terrorism at ports, in cargo containers, and I developed and built detectors that are extremely cheap and also very sensitive. My other big development is a system to produce medical isotopes that are injected into patients and used to diagnose and treat cancer.

As a kid, I was obsessed with space. Well, I was obsessed with nuclear science too, to a point, but before that, I was obsessed with space, and I was really excited about, you know, being an astronaut and designing rockets, which was something that was always exciting to me.

I really have become convinced that nuclear fusion is our energy future. It's so powerful. I mean, it is the power of the stars. If we could bring that down to the laboratory and to the power plant on Earth, that would be an incredible thing.

I was about 10 when I got into nuclear science. That was when that spark hit me. It took a few years of research, but when I was 14, I produced my first nuclear-fusion reaction.

I don't mean to offend anybody, but I think that we get a lot of scientists now who are bent into a system, and we lose some of their boldness by that. Obviously, you have to learn the ropes, but I think it's important to do that without hammering out the radicalness that makes innovation happen.

I developed a counterterrorism device that's revolutionizing the way we detect nuclear materials.