Qa'dah 19, 1435, Sep 14, 2014, SPA -- Australia is preparing to contribute 600 troops and up to 10 military aircraft to the increasingly aggressive campaign against the terrorist Islamic State's organization extremists in Syria and Iraq, AP quoted Prime Minister Tony Abbott as saying Sunday. Abbott said Australia was responding to a formal request from the United States for specific contributions to the international coalition. The 400 air force personnel and 200 others in the contingent could be deployed this week, he told reporters in Darwin.