SACRAMENTO (AP) - The recent arrest of a prison parolee in Southern California illustrates a potential terrorism danger that federal officials have been warning about for months - that inmates in state prison systems are particularly susceptible to radical Islamist ideology. Prison officials across the nation say they so far have seen more potential for recruitment than real threats, but said they have been monitoring Muslim groups since the 2001 terrorist attacks. Federal officials arrested three men since early last month in a plot that targeted Jewish and National Guard sites. Authorities said they believe the plan originated among a...