Twenty years after Guantánamo Bay detention operations commenced on January 11, 2002, a new report assesses the massive costs of US unlawful transfers, secret detention, and torture after the September 11, 2001, attacks. The report, from the Costs of War Project at Brown University’s Watson Institute and Human Rights Watch, outlines how these abuses trample on the rights of victims and suspects, create a burden to US taxpayers, and damage counterterrorism efforts worldwide, ultimately jeopardizing universal human rights protections for everyone.