# AUKUS is Australia’s worst and riskiest defence decision, inquiry says

A public inquiry into Australia’s AUKUS submarine deal found it is the country’s worst, riskiest, and most costly defence decision ever. The finding challenges the multibillion-dollar nuclear-powered submarine agreement with the UK and US. It matters because it raises serious doubts about the deal’s costs, strategic risks, and rationale amid major defence spending.

**Importance:** 4/5

## Sources

### World
- [The Guardian World](https://www.theguardian.com/australia-news/2026/nov/04/aukus-worst-australian-defence-decision-ever-public-inquiry) — Wed, 04 Nov 2026 04:38:39 GMT