Updated on April 22 with video of sixth and final segment in the series. The PBS NewsHour is launching a special series of reports, both on-air and online, about a puzzling disorder that touches many lives across the U.S.:…

Editor's Note: As part of the upcoming Autism Now series, we asked series producer Caren Zucker to re-introduce us to the story of Donald -- the first person ever diagnosed with autism -- which she wrote about with her…