Now, this week we’ve been with the men and women from the RAF who are based in Estonia as they protect NATO’s eastern flank.
Typhoon jets from RAF Lossiemouth are part of the operation helping to keep the skies safe.
But just as important is the work being done with the Estonian forces.
In the last of our special reports from the Amari air base, Steven Brown looks at the engagement with the local community in Estonia.
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