Extras

    Video thumbnail: PBS NewsHour Trump's tweets and conspiracies redefine what's presidential

    PBS NewsHour

    Trump's tweets and conspiracies redefine what's presidential

    Trump's tweets and conspiracies redefine what's presidential

    Trump's tweets and conspiracies redefine what's presidential

    Video thumbnail: PBS NewsHour Santana on Woodstock at 50: 'Kumbaya will kick your ass'

    PBS NewsHour

    Santana on Woodstock at 50: 'Kumbaya will kick your ass'

    Santana on Woodstock at 50: 'Kumbaya will kick your ass'

    Santana on Woodstock at 50: 'Kumbaya will kick your ass'

    Video thumbnail: PBS NewsHour 'Flexn' dance style stretches limits of self-expression

    PBS NewsHour

    'Flexn' dance style stretches limits of self-expression

    'Flexn' dance style stretches limits of self-expression

    'Flexn' dance style stretches limits of self-expression