Federal immigration agents raided the world’s largest kosher meatpacking plant Monday and arrested as many as 700 workers. It was the largest immigration raid ever in Iowa. The raid at Agriprocessors Inc. was carried out by sixteen local, state and federal agencies, led by ICE, the Immigration and Customs Enforcement. ICE said they entered the Iowa plant to execute a criminal search warrant for evidence relating to aggravated identity theft, fraudulent use of Social Security numbers and other crimes.