"Now we're going, ready or not. Now it's time for the news," Guthrie said as the broadcast began.
84-year-old Nancy Guthrie was reported missing from her home in Arizona on February 1. A video clip released by the FBI shows a masked, armed person outside Guthrie's door in connection with the disappearance.
Despite intensive search efforts involving thousands of federal and local police officers and volunteers, no trace of the woman has been found.
Savannah Guthrie said in interviews the incident has changed her and that it is difficult to move on without knowing what happened to her mother.
