美国芝加哥抗议者与执法人员发生冲突，多名警员受伤，21人被逮捕

Core Viewpoint - On November 14, a significant protest occurred in Chicago, where hundreds of demonstrators clashed with law enforcement outside an Immigration and Customs Enforcement facility, leading to multiple injuries among police and 21 arrests [1] Group 1: Protest Details - Hundreds of protesters gathered outside the ICE facility in Chicago [1] - The clashes resulted in injuries to several police officers [1] - A total of 21 individuals were arrested during the protests [1] Group 2: Government Actions - The U.S. Department of Homeland Security initiated enforcement actions in September targeting "criminals in illegal residence" in Chicago [1] - Protesters accused the federal government of excessive use of force in its enforcement actions against immigrants in Chicago [1]