Chantal, Andrew and Bruce join Peter in Calgary for a special At Issue, taped before an audience at Mount Royal University.
CBC News Posted: Oct 20, 2011 8:45 PM ET Last Updated: Oct 26, 2011 11:38 AM ET
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U.S. President Donald Trump is undoing a lot of agreements: NAFTA, Obamacare, protection for undocumented immigrants and the Paris climate accord. Mixed messages leave some wondering if Trump's White House might be unravelling.
An explosion from the merger of two neutron stars, the source of gravitational waves, has been viewed by astronomers with telescopes for the first time.