US TV
The high-profile ex-NBC host said coverage of the death of model Anna Nicole Smith made her realise that it was no longer for her.
Shriver, Arnold Schwarzenegger's wife, left in 2004 after he became California Governor. She said she could not juggle her role as California's First Lady and a full-time job.
But she told a conference on women that the Nicole Smith coverage last year convinced her to stay away.
"It was then that I knew that the TV news business had changed and so had I," she explained. "I called NBC News and told them I'm not coming back."
She was speaking at the annual California Governor and First Lady's conference on women.
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