In efforts to get inside the fold, reporters have fellow-traveled with religious groups, posing as members or prospective recruits.
These are stings to expose scam artists, quacks and hucksters who prey on the needs or naivete of their customers, clients, or patients.
Journalists have devised any number of ruses to get inside hospitals and clinics -- as patients or staff members.
Across the world, journalists have used undercover techniques to expose individual predators and as well as major sex crime rings.
Journalists who infiltrated U.S.-based Nazi bunds, the Ku Klux Klan, the Gomorrah, and other secret societies and closed groups.
Reporters have worked as migrant laborers and shadowed undocumented workers crossing the border into the United States.
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