 In Exercise Dynamic Manta that we're hosting right now in the Central Mediterranean Sea, we're going to be practicing finding submarines using a task group consisting of ships, fixed wing aircraft, helicopters, and other submarines. Submarines have a wide variety of capabilities. The ability to launch missiles that can threaten our population centers, critical infrastructures, and our nations. So it's very important for NATO to understand where adversaries' submarines are. It's a very asymmetric problem. In other words, it often takes several assets just to track one submarine.