Canada is facing significant hurdles in its attempt to revoke the citizenship of Tahawwur Hussain Rana, who is accused of being a key planner behind the November 2008 Mumbai terror attacks that resulted in 166 deaths. Despite his extradition to India and conviction on terrorism-related charges, the Canadian government is struggling due to changes in citizenship legislation enacted under former Prime Minister Justin Trudeau. These changes removed terrorism as a basis for revoking citizenship, forcing Immigration, Refugees and Citizenship Canada (IRCC) to seek a different legal avenue by proving that Rana obtained his citizenship through deception. Rana became a Canadian citizen in May 2001, claiming residency in Ottawa, but investigations revealed he spent most of that time in Chicago, United States. Experts criticize the slow process, which can take up to a decade, and highlight the systemic failures in Canada's immigration and citizenship system, raising concerns about national security and the effectiveness of counter-terrorism efforts.