About 100 protesters marched in the streets of downtown Los Angeles Thursday, Feb. 9, 2017, blocking streets and disrupting traffic after reports that federal agents had carried out a series of immigration raids across Southern California earlier in the day. Late Monday night, Homeland Security Secretary John Kelly issued two memos that outline the department’s guidelines for carrying out executive orders signed by President Donald Trump on Jan. 25. The memos detail how immigration enforcement will be stepped up along the United States-Mexico border and within the United States, giving federal agents broad authority to arrest and deport virtually any undocumented resident who entered the U.S. as an adult.