The city's patchwork of close-knit neighborhoods has created a type of zone defense meant to slow immigration agents and even force them to withdraw.

CHICAGO: The immigration agents’ tear gas grenades clinked and then exploded against the concrete, shrouding the block in plumes of white gas. The dozen or so residents at the…

The city's patchwork of close-knit neighborhoods has created a type of zone defense meant to slow immigration agents and even force them to withdraw.