US President Donald Trump has announced big plans for a powerful air and missile defence shield across North America. But he can’t build it without Canada, and it’s still not clear if Canada wants to be part of it,

President Donald Trump’s plan in launching his Golden Dome missile defense shield. This plan is modeled on Israel’s proven successful “Iron Dome” homeland defense network. This robust, complex multilayered system is one of the many factors that strengthen North American security.

Some experts are worried about the cost and timeline of U.S. President Donald Trump's proposed "Golden Dome" missile defence system, which Canada has expressed interest in joining. They also say it could set off a space-based arms race that would escalate global tensions.