In his latest book, "Journalism," cartoon reporter Joe Sacco brings together a collection of his short form reportage from the past decade. It's a series of visual stories that look at people at the margins of society, those just hanging on, like Chechyans displaced by the violence back home, Sub-Saharan Africans unwelcomed by residents of Malta, and the experience of Dalits (formerly known as "untouchables") in a rural Indian town that adheres closely to caste politics. Marco Werman talks to Joe Sacco about what cartoons bring to journalism.

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