Previous Immigration and Customs Enforcement (ICE) officers arrest a suspect during a pre-dawn raid in Santa Ana, California. ICE has started the largest immigration enforcement action in U.S. history to locate illegal immigrants who have criminal convictions and/or are in violation of deportation orders. The week-long series of raids targeted five counties in the greater Los Angeles metropolitan area. © 2007 AP Photo/Mark Avery Next

Immigration and Customs Enforcement (ICE) officers arrest a suspect during a pre-dawn raid in Santa Ana, California. ICE has started the largest immigration enforcement action in U.S. history to locate illegal immigrants who have criminal convictions and/or are in violation of deportation orders. The week-long series of raids targeted five counties in the greater Los Angeles metropolitan area. © 2007 AP Photo/Mark Avery