Martin Kaste is a correspondent on NPR's National Desk. He covers law enforcement and privacy. He has been focused on police and use of force since before the 2014 protests in Ferguson, and that coverage led to the creation of NPR's Criminal Justice Collaborative.
The last show of the pop icon's "Celebration" retrospective tour brought over a million and a half fans to Rio de Janeiro's famed Copacabana Beach on Saturday night.