The US has frequently invoked national security as a justification for policies that violate international law. These include the torture of detainees in the US “war on terror,” secretive targeted killings abroad, and indefinite detention without trial at Guantanamo Bay. Within the US, the government has conducted unfair terrorism investigations that in some cases have effectively entrapped indigent and mentally ill persons. Large-scale surveillance by the National Security Agency is hampering the ability of journalists and lawyers to do their work and corroding US democracy. We have consistently called for the US to provide fair trials in civilian courts to all terrorism suspects, ensure accountability for past abuses, including at the highest levels of government, and bring all national security policies in line with US obligations under international human rights and humanitarian law.