The "Afghanistan Papers," released last week by the Washington Post, contain hundreds of interviews with high-ranking officials involved in the ongoing 18-year war in Afghanistan. The documents reveal that many insiders knew the war was dysfunctional and unwinnable. That comes as no surprise to CBC's Murray Brewster, who spent 15 months on the ground in Afghanistan covering the war. Today on Front Burner, he describes Canada's role in the war, the challenges the Canadian military faced there, and why he thinks there are still important questions to be answered about this country's involvement.