Senator STERLE (Western Australia) (14:11): Mr President, I ask a further supplementary question. Minister, are you aware of any risk to ensuring Australians obtain the maximum benefit from the exploitation of Australia's mineral wealth? Honourable senators interjecting— The PRESIDENT: When there is silence we will proceed. If you want to chew up question time calling across the chamber— Senator Heffernan interjecting— The PRESIDENT: You are chewing up time, Senator Heffernan.