During his tenure , he also emphasised the need to focus on security challenges close to Allied territory .
As Prime Minister , Stoltenberg worked for a constructive relationship with Russia through dialogue and cooperation underpinned by NATO 's deterrence and defence capabilities .
During Stoltenberg 's tenure , Stoltenberg also emphasised the need to focus on security challenges close to Allied territory .
As Prime Minister , Stoltenberg worked for a constructive relationship with Russia through dialogue and cooperation underpinned by NATO 's deterrence and defence capabilities .