President Trump on Tuesday announced his administration has selected the architectural design for a "Golden Dome" missile defense system to protect the United States from foreign threats. The president also said the budget package Republicans are currently ironing out on Capitol Hill will include an initial $25 billion to begin construction on the missile defense system.

The system is intended to protect the United States from ballistic, cruise and hypersonic missiles, and missiles launched from space.

There are doubts from experts on how the US would deliver a comprehensive system and it is unclear how Canada would participate or how much it would pay.