The number of active hate groups in the U.S. has doubled in the last 10 years. New studies indicate there are now more than a thousand of these groups in America today. High unemployment, changing demographics and anger at a black president are among the factors attracting new members. The shooting rampage by a white supremacist at a Sikh temple in suburban Wisconsin has raised concerns about the danger posed by these groups, which are treated differently than foreign terrorists by law enforcement. Diane and guests discuss the rising threat of hate groups and what can be done to track their members.