Mr ZAPPIA (Makin) (14:29): My question is to the Deputy Prime Minister. How will Australia's nuclear powered submarines open opportunities in science and research and create a skilled workforce for generations to come? Opposition members interjecting— The SPEAKER: I have been patient with this issue. When people are asking questions from both sides, they'll be heard in silence. Before ministers speak is not the time to interject. The Deputy Leader of the Opposition continually abuses that. I'm just reminding all members for one last time, you can't expect respect shown on one side and not shown to the other. It's got to be disciplined and it's got to be each time the question and answer begins.