13:06Newshour19/09/2021 12:06 GMT: Australia defends new deal with US and UKBBC World Service Duration: 50 minutes Sun 19th Sep 2021, 13:06 on BBC World Service OnlineAustralia says it needs nuclear-powered submarines to act as a deterrent. Show more GenresNewsFormatsMagazines & ReviewsBrandNewshour Source: BBC Online