The head of Canada's military space division says we 'should absolutely be' concerned about a nuclear threat from Russia in space. He spoke with Catherine Cullen, host of CBC Radio's The House, about how Canada might respond. Listen to the full interview: cbc.ca/9.7088665 »»» Subscribe to CBC News to watch more videos: http://bit.ly/1RreYWS For breaking news, video, audio and in-depth coverage: https://www.cbc.ca/news Follow CBC News on TikTok: https://www.tiktok.com/@cbcnews Subscribe to CBC