stephanie monroe with the consortium says there are many things black people can do. >> we understand through the research that's been conducted about adopting risk-modifying strategies can help prevent as much as 40% of all alzheimer's disease. these include adopting a heart-healthy lifestyle, watching your nutrition, fruits and vegetables, septembering up a plate that has a lot of color on it to make sure we're getting enough. adequate sleep, eight hours a night. hydration. staying brain active. staying engaged with other people. having those kinds of social interactions. all of these things including exercise, at least 15 minutes a day, getting your heart rate up, can be very helpful with healthy aging and keeping your cognition where it needs to be. >> i know you're working on a clinical trial, it's under way right now, specifically gearing towards helping slow the progress in alzheimer's. talk to me about that study and the biggest challenge that you're all seeing with that. >> well, the study, and people can get more information going to the web site, is really exciting. we have