The RAF normally employs its Typhoon jet fighters for land-based NATO Air Policing missions. However, this year, 617 Squadron's F-35 B Lightnings took on the job for the first time.
InsideAIR's Flt Lt Amy Casey went to Iceland to see how they got on.
InsideAIR is produced for the Royal Air Force by RAF Media Reserves. Theme music by RAF Music Services.
