On air for: Almost three seasons. Cause of cancellation: While the primary reason was low ratings, Carlson stated that his network, MSNBC, had changed and "they didn't have a role for me." Most memorable moment: Carlson followed news overseas, broadcasting two episodes of the political debate show from London after the July 7, 2005, terrorist bombings. Where he is now: The conservative commentator moved on to co-host "Fox & Friends" and serves as editor-in-chief of the political news website the Daily Caller.
Jay Paul / For the Los Angeles Times
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