The United States has launched a formal review of its AUKUS nuclear submarine deal, throwing the defence pact with Britain and Australia into doubt. It comes as Washington pushes its allies to spend more on defence. Emma Shortis, director of the international and security affairs programme at the Australia Institute, tells CNA's Asia Now what she believes prompted this reassessment of the agreement. Subscribe to our channel here: https://cna.asia/youtubesub Visit our website: https://cna.asia