FBI probe uncovers a list of potential Southland targets and suggests a connection between prison groups and Islamic extremists. A Pakistani national has been arrested by authorities in connection with a far-reaching investigation of a possible terrorist plot targeting any of nearly two dozen locations in Southern California, including National Guard recruitment centers, law enforcement sources said Monday. The suspect, identified as Hamad Riaz Samana, 21, of Los Angeles, was quietly taken into custody last week by counter-terrorism officials as part of a probe that began with the arrest of two men in Torrance suspected of robbing gas stations. The...