For more than a century, the U.S. Postal Inspection Service® has investigated the sexual exploitation of children. It was the first federal law enforcement agency to aggressively identify, target, and arrest individuals who produce and traffic in child pornography. Specially trained Postal Inspectors investigate crimes related to the sexual exploitation of children nationwide. Today, the majority of child exploitation cases investigated by Postal Inspectors involve both the U.S. Mail® and the Internet.