By NBC4 Staff Published: February 9, 2017, 2:43 pm COOK COUNTY, IL (WCMH) — A national sex trafficking sting ended in the arrests of 552 would-be sex buyers or sex traffickers. The National Johns Suppression Initiative began three weeks ago, ending on Super Bowl Sunday. Twenty-three law enforcement agencies in 14 states took part in the crackdown. “Sex trafficking continues …