8. San Diego, California
According to official information, more than 8,000 people annually, are victims of human trafficking in San Diego. Numerous of volunteers work on education of hotel workers, which are actually witnesses of the human trafficking but do not recognize it (or have a fear of reporting to the police). They also started police actions for searching the houses where pimps could hide their victims, mostly sexual workers, and share leaflets to prostitutes to encourage them to escape.