The Federal Bureau of Investigation announced on Monday that it has arrested 150 pimps and rescued more than 100 exploited teenagers involved in sex trafficking. Taken together, the raids, which took place in more than 70 cities, constitute the largest FBI action focused on finding sexually exploited children. The youngest child recovered was 13 years old, according to authorities. Ronald Hosko, assistant director of the FBI’s criminal-investigative division, said the bureau hopes that more people will now be aware of sex trafficking. Those arrested will face human-trafficking charges.