Human rights refer to inherent rights, while civil liberties are legal rights and freedoms protected by a country's constitution or basic laws. The war on terror has led to tensions between civil liberties and national security, with increased surveillance and law enforcement powers. The USA Patriot Act expanded these powers after 9/11, especially through Title II and its controversial warrantless surveillance. While renewed in 2006 with new oversight, critics argue the act still compromises privacy and civil liberties in the name of antiterrorism.