The Greenes say they take it a day at a time and relish the many long-term memories they've shared for nearly 60 years. David Gilkey/NPR hide caption

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Sherwin Nuland speaking at TED. TED hide caption

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Depression is common among old people, affecting up to 25 percent. hide caption

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Soldiers advance toward a simulated Afghan town during a training exercise at Fort Bliss in El Paso, Texas, in 2012. While the suicide rate is rising in the military, it's declining for troops stationed at Fort Bliss, thanks in part to efforts to ramp up suicide awareness and prevention training. Brendan Johnson/Flickr hide caption

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Confessions of a Sociopath is written under the pen name of M.E. Thomas. Random House hide caption

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Instructional assistant Jessica Reeder touches her nose to get Jacob Day, 3, who has autism, to focus his attention on her during a therapy session in April 2007. Rich Pedroncelli/AP hide caption

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Beheading Barbie is the kind of aggression that can cause sibling distress. hide caption

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Talk therapy is best for some people; antidepressants are better for others. Scientists say PET scans might help figure out early on what treatment a person needs. hide caption

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More than 200 people have Walking Gallery jackets that tell the story of their experiences with health and the medical system. Maggie Starbard/NPR hide caption

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