Last month federal agents raided 60-odd Wal-Marts across the nation and picked up 250 all-night janitors and many documents, hoping to make a case against the retailer for immigration violations.

• 上个月，美国联邦调查人员突击抽查了60家分布美国各州的沃尔玛超市，带走了250名值全夜班的看门人和大量文件。他们希望以违反移民法为由，对该零售商立案调查。