CSIS director David Vigneault has testified on Parliament Hill about foreign meddling, calling the Chinese Communist Party the “principal threat” to Canada's democratic institutions. What Vigneault was asked about, how he responded, and David Akin explains why Prime Minister Justin Trudeau is resisting the growing pressure to call an inquiry, and how the opposition parties disagree over what an inquiry would look like. An avalanche near Panorama Mountain Resort in British Columbia has killed three German nationals, adding to the worst avalanche season Western Canada has seen in decades. How communities in two countries are now in mourning. In England, a public inquiry has found national security and counterterrorism officials failed to act on key information which may have prevented the May 2017 bombing at an Ariana Grande concert at Manchester Arena, which killed 22 people. The details on the findings, and the lessons learned. Another American retailer has decided to close its Canadian operations. Why and when Nordstrom will be shutting down. Plus, doctors without planetary borders: how the rise of space tourism is raising legal questions about aerospace medicine. And ancient discovery: the first glimpse of a secret chamber inside one of the Seven Wonders of the World.