Protestors walk through smoke Tuesday, April 28, 2015, in Baltimore. A line of police behind riot shields hurled smoke grenades and fired pepper balls at dozens of protesters to enforce a citywide curfew. (AP Photo/Matt Rourke)
Protestors walk through smoke Tuesday, April 28, 2015, in Baltimore. A line of police behind riot shields hurled smoke grenades and fired pepper balls at dozens of protesters to enforce a citywide curfew. (AP Photo/Matt Rourke)
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