SYDNEY (AFP) - Australia on Thursday expressed concern after an image of Sydney's iconic Opera House appeared on a Qaeda-linked site which authorities described as encouraging "lone wolf" attacks. The landmark building is featured in the latest edition of "Inspire", an English-language site dealing with bomb-making and terrorism, reportedly run by associates of Al-Qaeda in the Arabian Peninsula, a militant group. "Its aim is to literally inspire the lone wolf attack, in Australia and any other countries for that matter, it is circulated internationally," Attorney-General McClelland told reporters.