suntimes.com — Updated: Our national motto seems to be "pull up the ladder now that I'm on board." I wonder if 50 years from now the children of Mexican immigrants will be grousing about all the Nigerians we're letting in. Mark S. Anderson Buenos Dias: I scanned last minute's NewSplat ("African shepherds to call Chicago home," Sun-Times-Tribune, July 2, 2062) with alarm.