Donald Trump’s talk of telling President Putin to “do whatever the hell he wants” to NATO allies who “don’t pay” has been called unhinged, but he could be President again.

So Sitrep examines if Europe could defend itself against Russia without American support, if it really came to that.  

Professor Michael Clarke and Simon Newton explain how European military capability compares to Russia’s and former NATO Deputy Secretary General Rose Gottemoeller gives an alliance insider's view.

Also on Sitrep we’re at Marchwood sea loading centre as hundreds of British military vehicles head to NATO’s biggest exercise in decades.

And the former climate-change champion for defence, Lieutenant General Richard Nugee, talks us through the practicalities of getting militaries to do more for the environment.