Redpath, Olcott, Richardson and Thomson all went South for the New York Tribune and produced reporting undercover in the run-up to the Civil War.

Stephen Crane's "experiments" in luxury and misery for the New York Press. The poet John Berryman later described Crane's "misery" piece as one of his very finest.

Getschow lived and worked as an oil industry day laborer to expose conditions in the temporary "slave labor camps" throughout the Southwest.

Reporters have worked as migrant laborers and shadowed undocumented workers crossing the border into the United States.

Waste, fraud, graft, laxity, dilapidated conditions, corruption: Reporters have often used undercover tactics to investigate.