David Lipson looks at why Finland and Sweden want to join western military alliance NATO. It signifies a historic shift in policy for the peaceful Nordic nations and will redraw Europe's security map. Subscribe: https://ab.co/3yqPOZ5 Read more: https://ab.co/3amJ18T

ABC News In-depth takes you deeper on the big stories, with long-form journalism from Four Corners, Foreign Correspondent, Australian Story, Planet America and more, and explainers from ABC News Video Lab.

Watch more ABC News content ad-free on iview: https://ab.co/2OB7Mk1

For more from ABC News, click here: https://ab.co/2kxYCZY

Get breaking news and livestreams from our ABC News channel: https://www.youtube.com/user/NewsOnABC
Like ABC News on Facebook: http://facebook.com/abcnews.au
Follow ABC News on Instagram: http://instagram.com/abcnews_au
Follow ABC News on Twitter: http://twitter.com/abcnews

Note: In most cases, our captions are auto-generated.

#ABCNewsIndepth #ABCNewsAustralia