http://www.cairco.org... http://www.cairco.org... enter the country illegally http://www.cairco.org... 15-20 million http://www.cairco.org... http://www.cairco.org... 20 million illegal immigrants http://www.cairco.org... http://www.cairco.org... 40 million illegal aliens enter the country illegally http://www.cairco.org... http://www.cairco.org... other immigrant families enter the country illegally estimated cairco.org, http://www.cairco.org... How many illegal aliens reside in the United States? http://www.cairco.org... enter the country illegally enter the country illegally 20 million illegal immigrants