Just a few decades ago most people used — and trusted — the same news sources. Now, Americans are siloed in separate ecosystems, consuming conflicting depictions of reality. Misinformation runs rampant. Conspiracy theories flourish. And extremism grows. Today on The Sunday Story from Up First, reporter Ben Bradford brings us back to the moment when the first crack formed in America's news media. And how that crack widened and widened, until we split into separate worlds.

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