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Mary Wyant spent years as a professional artist. But after being diagnosed with Alzheimer's, she slowly became unable to paint. Here is a look at her work through the years, and as the disease took hold. Click on the image…

On Tuesday's PBS NewsHour, Miles O'Brien visits the nation's most active explosives test facility, where scientists investigate the bombs that were detonated at the finish line of the Boston Marathon. Screen grabs from PBS NewsHour/NOVA It's a strange phone…

Now is your chance to ask the PBS NewsHour senior correspondents anything you want. Tweet your questions to @NewsHour. Forty years ago, Robert MacNeil and Jim Lehrer reported on the Watergate scandal. Their coverage laid the groundwork for…