CNN's Mark Thompson announces Poppy Harlow's departure in a Friday morning meeting.

Harlow bids farewell to CNN, reflecting on 16 years of growth in a heartfelt email to colleagues.

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Harlow's exit from CNN leaves behind a legacy of impactful journalism and storytelling.

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The turbulent journey of "CNN This Morning," co-hosted by Harlow, facing challenges that led to its cancellation.

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