The Sicilian Mafia has joined forces with criminal gangs from Nigeria to run drug and prostitution rackets, according to the Italian police. Last year alone, up to eight thousand women were trafficked from Nigeria to Italy and put to work in the sex trade. Charlotte Baarda is a researcher at the Extra-Legal Governance Institute, Oxford University.

(Photo: Nigerian prostitute, Credit: PIUS UTOMI EKPEI/AFP/Getty Images)