MCLEAN, VA. - The U.S. is its own worst enemy when it comes to the desperately important task of recruiting immigrants as spies, analysts and translators in the war on terror, new Americans are telling intelligence officials. The government's policies raise suspicions and fear in the immigrants' home countries and disturb potential recruits in the U.S. who might otherwise want to help. The U.S. knows it needs the help. At the heart of a Friday summit with immigrant groups was a stark reality: The intelligence agencies lack people who can speak the languages that are needed most, such as Arabic, Farsi and Pashtu.