 So continuing education is essential. Any business that wants to remain competitive has to have their workforce coming up to speed constantly. And in my case, my classes are about specifications and standards. Those are living documents, right? So you take the class one year, five years later, you're out of date, right? So it's really important to continue developing that knowledge and that understanding. But that's just specifications. The optics industry is very dynamic. The industry is changing constantly, right? The way we make optics, the way we specify optics, constantly evolving. How we use them, what kind of applications we can do. If your people aren't out there getting that continuing education all the time, they get stale. They don't know what they don't know.