President Trump's missile defense project, called the "Golden Dome for America," aims to protect the U.S. from foreign threats. But it has a steep price and has been criticized by China as threatening to increase the risks of militarizing space and a global arms race.

Canada is looking at potential investments in U.S. President Donald Trump's proposed Golden Dome missile defense shield, Prime Minister Mark Carney told reporters on Wednesday.

"I think it's opening a Pandora's box," said Victoria Samson, director of space security and stability at the Secure World Foundation think tank in Washington, referring to deploying missiles in spac...