 that are aging from 75 years up and older. And I want to try to discover today, if we can, how to deal with that. And I'm a Vietnam veteran, so I'm getting close to that benchmark. I'm not 75 yet, but I'm worried about what happens next, what's coming up. And one of the things we want to focus on with you to start with is what types of brain and thinking changes are coming for people, veterans like me, as we age?