As the search for Savannah Guthrie's mother, Nancy, continues, a cardiologist explains how pacemakers work and if they can be used to track a missing person's location.

Arizona police say they believe Nancy Guthrie, the missing mother of US news anchor Savannah Guthrie, "is still out there", though they have yet to identify a suspect in her disappearance five days af...

Savannah Guthrie posted a video to Instagram on Wednesday in which she and her siblings, Annie and Camron, issued an emotional plea to their mother’s kidnapper or kidnappers.