Sitrep analyses open-source intelligence which shows an uptick in secretive surveillance flights, by the UK, US and Russia, in the High North and over the Baltic.

Defence Analyst and former infantry officer Ed Arnold explains the possibilities behind the activity, and we hear first hand from NATO's Arctic Ocean patrols.

Could peat-bogs be used as tank-traps to help protect Eastern Europe from Russian invasion? We hear from Estonia where they’re looking at potential spin-off benefits from their plan to tackle climate change.

And BBC weather forecaster Simon King draws on his RAF experience to explain the science of weather manipulation, and whether militaries could ever hope to use it to their advantage.