Murray Olds: Australian correspondent on the costs associated with Australia's AUKUS subs going up - Heather du Plessis-Allan Drive

Australia's AUKUS deal is facing additional pressures as the US is calling for an increase in defence spending.

The US and the United Kingdom have both launched reviews into the multi-billion-dollar submarine deal amid production and tariff-based concerns. 

Australian correspondent Murray Olds says costs have already blown out to over $400 billion and counting.

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