January 11, 2020 - PBS NewsHour Weekend full episode

On this edition for Saturday, January 11, Iran says the downing of a Ukrainian passenger plane last week was “human error," an influx of migrants attempting to head to the U.S. are stuck in limbo in Mexico amid shifting immigration policies, and neuroscientist Daniel Levitin explores how to age successfully. Hari Sreenivasan anchors from New York.