(Portland, OR)  --  More than half a dozen men are facing charges following a human trafficking sting.  The Portland Police Bureau says its Human Trafficking Unit cited eight men on charges of commercial sexual solicitation during the undercover operation last month.  Officers posted online decoy ads on human trafficking websites and then cited the men who contacted them to arrange payment for sexual acts.  Police say survivors of human trafficking may be hesitant to get help from law enforcement because they're concerned about their personal safety and they fear arrest.  The Human Trafficking Unit has victim advocates for those who need help.