加媒：特朗普称加拿大希望加入“金穹”导弹防御系统计划，加政府回应

Group 1 - The core point of the article is that Canada has expressed interest in joining the U.S. "Iron Dome" missile defense system project, which is currently under discussion between the two governments [1][3]. - The "Iron Dome" missile defense system is a three-year project with an estimated cost of approximately $175 billion, aimed at creating a multifunctional missile defense system [3][4]. - President Trump stated that Canada will pay its "fair share" for the project and that discussions regarding the financial arrangements are ongoing [3][4]. Group 2 - The Canadian government confirmed that discussions about missile defense are part of broader trade and security negotiations between Prime Minister Trudeau and President Trump [3]. - The specifics of Canada's participation in the "Iron Dome" project, including responsibilities and payment amounts, remain unclear [3][4]. - The "Iron Dome" system is intended to integrate with existing U.S. missile defense capabilities and aims to intercept missiles launched from various locations, including space [4].