During Operation Guardian II a squadron was deployed to protect the March 2002 Commonwealth Heads of Government Meeting ( CHOGM ) in south-east Queensland . During this , the Australian Defence Force pilots were given permission to destroy any hostile aircraft . This has not happened at any time during Australian peacetime , but was deemed necessary because of the 11 September 2001 attacks six months earlier
11 September 2001 attacks
September 11 attacks
Air Combat Group RAAF