Prime Minister Mark Carney declined to say how much Canada might spend if it decided to take part in the Dome project.

Canadian Prime Minister Mark Carney said Wednesday his government is talking to the U.S. about joining President Donald Trump's future Golden Dome missile defense program. The multilayered, $175 billion system would for the first time put U.

PM Mark Carney's office says there are "active discussions" on the Golden Dome, but it's too early to say how Canada would join or pay in.