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Steve Silberman talks about how Nazi extermination plans and a discredited scientific paper about childhood vaccines shaped our current understanding of autism. Originally broadcast Sept. 2, 2015.

First responder John Feal created a memorial for other Sept. 11 responders who died not on the day, but of health issues related to working at ground zero.

Longtime VW employee James Robert Liang worked for the carmaker in Germany and in the U.S., where he helped bring a troubled diesel engine to market.

You know when you're at a cafeteria, you've got your lunch and then you just don't know where to sit? You don't want to sit alone, but you also don't know who would be friendly and let you sit with them. Sixteen-year-old Natalie Hampton has been there. She's an 11th grader from Sherman Oaks, Calif., and the creator of a new app called Sit With Us.

Desmond Patton is studying how gangs in Chicago use social media to communicate. Now he is helping to create an algorithm to predict when a social media threat might spark real life violence.

The Obama administration is halting construction on the pipeline after concerns were raised by a nearby Native American tribe. A federal judge previously ruled construction could proceed.

Dana Walrath used her skills as an artist and medical anthropologist to chronicle her mother's final years with dementia. The process helped her see beyond the loss and embrace the moment.

Ten years of tax filings reveal the relatively modest income of a public servant. Pence's spokesman says Donald Trump will release his returns after "a routine audit."

A survey of nearly 66,000 people worldwide reveals where parents have the most — and least — confidence in vaccines.

Hundreds of Native Americans and their supporters have gathered in North Dakota to protest the construction of the Dakota Access Pipeline.