With Australia set to re-open its borders, a lot of us are facing that most onerous task of international travel - renewing our passports. So what is it about this little booklet that makes it so special? Why are they so coveted by intelligence services and terrorist groups? And why aren't we allowed to smile in our passport photos? And why aren't we allowed to smile on in our passport photos? Make sure your luggage has been in your possession at all times while listening this week!

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