Surface tension: could the promised Aukus nuclear submarines simply never be handed over to Australia?

The multi-billion dollar deal was heralded as ensuring the security of the Indo-Pacific. But with America an increasingly unreliable ally, doubts are rising above the waves

Maybe Australia's boats just never turn up.

To fanfare and flags, the Aukus deal was presented as a sure bet, papering over an uncertainty that such an ambitious deal could ever be delivered.