Sudden death in young people is rare, but Matthew Thomas and Matthew Wolf say that through early detection of inherited heart conditions, better precautions can be taken. And: Depression affects almost 15 million American adults, yet doctors still don’t know much about how it works. Researcher Pearl Chiu says that it may be possible to make a personalized diagnosis of depression through brain imaging. Plus: Lisa Ellison's brother was plagued with mental health issues until age 20, when he committed an awful crime and then took his own life. Lisa graduated from the Clinical Mental Health Counseling program at James Madison University and is now an advocate for suicide prevention and mental health support.

Later in the show: HIV infections are rising among a surprising segment of the population--African Americans over the age of 50. John Fife is working to combat this disturbing trend. And: Millions of people in developing countries go blind due to cataracts because there aren’t enough surgeons trained in the five-minute procedure to remove them. Glenn Strauss is designing a simulator that will train 30,000 who could give millions the life-changing operation.