Government and defence officials are set to face a Senate Estimates hearing on Wednesday over why a Virgin Airlines pilot ...

Senator Jacqui Lambie has warned the Chinese warships that recently carried out live-fire drills off the Australian coast ...

Defence officials believe a Chinese nuclear-powered submarine accompanied the flotilla during its deployment off Australia's ...

Australia correspondent Karen Middleton looks at the pressure Australian officials are coming under to explain why it was a Virgin airline pilot who alerted the Australian and New Zealand governments ...