Torture is the act of inflicting severe pain (whether physical or psychological) as a means of punishment, revenge, forcing information or confession, or simply as an act of cruelty. Torture is prohibited under international law and the domestic laws of most countries in the 21st century. It is considered a human rights violation and is declared unacceptable by Article 5 of the UN Declaration of Human Rights. Signatories of the Third Geneva Convention and Fourth Geneva Convention have officially agreed not to torture prisoners in armed conflicts. National and international legal prohibitions on torture derive from a consensus that torture and similar ill-treatment are immoral, as well as impractical. Despite international conventions, torture cases continue to arise such as the 2004 Abu Ghraib torture and prisoner abuse scandal committed by military police personnel of the United States Army. Organizations such as Amnesty International and the International Rehabilitation Council for Torture Victims monitor abuses of human rights and reports widespread violations of human torture by states in many regions of the world. Amnesty International estimates that at least 81 world governments currently practice torture, some of them openly.