Unity between North America and its allies across the Atlantic Ocean is key as Europe faces a full-scale war and tensions rise around the globe, says outgoing NATO Secretary General Jens Stoltenberg.

The Duchess of York tells PEOPLE why the "key to life" is being there for one another Chris Jackson/Getty; Pascal Le Segretain/amfAR/Getty; Max Mumby/Indigo/Getty Sarah Ferguson says that family comes ...