Celine Cooper: Gun control isn't only a U.S. issue

Canadians across the country have responded with horror to yet another mass shooting in the United States. The killing of 17 people at Marjory Stoneman Douglas High School in Parkland, Florida this month has revived debate over our neighbours’ toxic gun culture. 
But something is different this time around. Student survivors have refused to stay silent. They are sparking a long overdue sea change in the conversation around guns and gun control in America. It’s a powerful thing t