World news from the BBC The founder and chief executive of Facebook Mark Zuckerberg has joined a campaign for immigration reform in the United States. He's launched a pressure group Forward US backed by other leading entrepreneurs from companies such as Google, Yahoo and Linkedin as well as Silicon Valley investors. ___________________________脸谱网站的创始人和首席执行官马克`扎克伯格加入了改革美国移民政策的运动.他发起了一个名为"前进美国"的压力组织,并且得到其他来自谷歌,雅虎,商务 人际关系网领头企业家和硅谷投资者所支持.____________________________