Senator DAY (South Australia) (14:40): Mr President, given that very interesting answer, I ask a supplementary question. The 2013 Defence and Security Cooperation Treaty with Great Britain promotes high levels of defence cooperation and interoperability. The British Astute class submarine has a nuclear reactor motor that will actually outlast the 30-year life of the vessel. BAE Systems— Opposition senators interjecting— The PRESIDENT: Order! Pause the clock! Senator Day will be given an extension because I could not hear him for the noise coming from this end. Secondly, he paused during his asking of the question because of the interjections from the left. Senator Day, would you continue with your question?