As many as 30,000 also operate in the United States, mostly in Los Angeles, according to U.S. federal authorities.Setting themselves apart by tattooing themselves head to toe with threatening symbols and hanging out in large crowds on street corners, their goal was to intimidate law-abiding citizens and rival gangs alike, experts say.Read More: http://apnews.myway.com/article/20071216/D8TIN2000.ht