what is the role of warn in pbs?
To provide an alternate path for WEA alerts to wireless carriers.
PBS
PBS provides an alternate path for WEA alerts to wireless carriers. 
is "slavery by another name" a novel? UNANSWERABLE what is "slavery by another name"? It is a book by American writer Douglas A. Blackmon. what is the book about? It explores the forced labor of prisoners, overwhelmingly African American men, through the convict lease system used by states and local governments. what kind of critical response did it get? It was a "New York Times" Best Seller and was praised by critics. did the book get adapted into a movie? As a 90-minute documentary film. what was the title of the film? Slavery by Another Name. who was the film's broadcaster? PBS what does it stand for? Public Broadcasting Service when was it founded? November 3, 1969 was it accused of being bias? Yes, on the program "Let Poland be Poland". was any lawsuit filed against the broadcaster? Yes, by Pacific Arts Corporation. why was it done? They were involved in a dispute over home video licensing rights. when was it filed? In the early 1990s.
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PBS [SEP] Warning, Alert and Response Network (WARN)
PBS provides an alternate path for WEA alerts to wireless carriers. The alerts are transmitted through the PBS satellite network on the AMC-21 satellite to PBS stations who broadcast the messages over their transmitters for reception by wireless carriers at their cell sites. The network is funded by a grant through National Telecommunications and Information Administration (NTIA).