 Let's take cancer therapy. There are cancers in challenging areas of the body, such as the brain, where the cancer is directly next to critical structures. And so, of course, we want to remove all of the cancer, but we also don't want to damage those critical structures. So what we can do, we think, is we can use these deep ultraviolet lasers to basically chop away that tissue and ensure that there are none of the nasty cancer cells left, but we also don't damage those critical structures.