The number of people in prisons in the United States declined slightly in 2017 to 1.5 million, according to data released on Thursday. But the country still has by far the largest known incarcerated population in the world.

The number of people in prisons in the United States declined slightly in 2017 to 1.5 million, according to data released on Thursday. But the country still has by far the largest known incarcerated population in the world. https://t.co/zmGMRTGsnE

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