Canadians mourn alongside Americans on this sad anniversary of 9/11. We were affected deeply on that day 10 years ago, nearly as much as the U.S. itself: not just by the Canadian lives we lost, but by the empathetic pain we feel when our closest kin suffers a tragedy. Whatever longstanding sibling rivalry Canadians have felt towards Americans vanished -- at that moment we became one family grieving death together. We also became key partners in what would be called the War on Terror: This week on HuffPost Canada, new contributor Jennifer Stoddart, Privacy Commissioner of Canada, offered important analysis of what this has meant to our privacy laws. We also welcomed aboard two distinguished contributors who offered their reactions to the news that the prime minister was considering re-introducing controversial anti-terrorism laws: former counter terror operative Mubin Shaikh and terrorist expert David Harris.