Guthrie on mother: 'We cannot be at peace without knowing'

In her first interview since the disappearance, Savannah Guthrie recounts the moment she learned her mother was missing and wrestles with the idea that her fame may have made her mother a target.

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'We cannot be at peace without knowing', she said in an interview that aired Thursday on NBC News' "Today" show, her first since 84-year-old Nancy Guthrie's apparent abduction.

More than 50 days have passed since Guthrie was first reported missing on 1 February. Authorities believe the 84-year-old was kidnapped, abducted or otherwise taken against her will. The FBI released surveillance videos of a masked man who was outside Guthrie's front door on the night she vanished.

The Guthrie family has offered a $1 million reward for information leading to the recovery of their mother.