CBS Evening News with Norah O'Donnell, 10/21

On tonight's CBS Evening News podcast -- former President Barack Obama hits the campaign trail for Joe Biden - how the former President is hoping to rally African-American voters to cast their ballots in time for Election Day. Also -- years after being separated at the US border, why some children are still living apart from their parents - how lawyers and volunteers are on a quest to try and reunite those families.

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