General James Mattis, a renowned military leader and former U.S. Secretary of Defense, joins Sir Angus Houston, former Chief of the Australian Defence Force, to discuss vital global security issues. They delve into the challenges posed by a rising China and navigate the complexities of Sino-Australian relations. The conversation highlights the importance of military alliances and international cooperation amid geopolitical tensions, and they emphasize climate change as a significant security crisis requiring urgent attention and collective action.