relevant experience; or have established competence in relevant areas of international law such as international humanitarian law and the law of human rights and extensive experience in a professional legal capacity which is of relevance to the judicial work of the Court. Trials are supposed to be public, but proceedings are often closed, and such exceptions to a public trial have not been enumerated in detail. Nonetheless, the ICC statute explicitly states that the principle is a public trial, and exceptions could be entertained by the judges if they provide sufficient grounding. In camera proceedings are allowed for protection of witnesses or defendants as well as for confidential or sensitive evidence. However, the statute states that this is an exception to the principle of public hearings which the court applies in particular to victims of sexual violence and children who are victims or witnesses. Hearsay and other indirect evidence is not explicitly prohibited in the statute, which adds flexibility to the proceedings due to the different legal traditions of the judges or of the applied law. But it has been argued the court is guided by hearsay exceptions which are prominent in common law systems, similar to the military commissions. Nonetheless, established rules of international law provides that admissibility of such evidence by guided by "hearsay exceptions generally recognized by some national legal systems, as well as the truthfulness, voluntariness and trustworthiness of the evidence." Criticisms Many observers and stakeholders have expressed the view that the military commissions have failed. These observers and stakeholders include former senior U.S. government officials and military officers; families of victims of the 9/11 attacks; former military commission prosecutors; federal prosecutors; prosecutors from the Nuremberg trials following World War II; academics; Members of Congress; human rights organizations; and others. There has been outrage directed at the United States' usage of military commissions to try Guantanamo Bay detainees by the international community. Criticisms include that the militaries control of the trials has led to unfair results and procedures. The military tribunals secrecy, lack of habeas corpus, and overarching military control has led to criticisms against the US's usage of them. In an amicus brief filed with the U.S. Supreme Court on August 20, 2021, September 11th Families for Peaceful Tomorrows – an organization of more than 250 family members of those killed in the attacks of September 11, 2001 – wrote the following: "Through their collective