Examples of particular states invoking universal jurisdiction are Israel's prosecution of Eichmann in 1961 (see below) and Spain's prosecution of South American dictators and torturers (see below). More recently, the Center for Constitutional Rights tried first in Switzerland and then in Canada to prosecute former US President George W. Bush on behalf of persons tortured in US detention camps, invoking the universal jurisdiction doctrine. Bush cancelled his trip to Switzerland after news of the planned prosecution came to light. Bush has traveled to Canada but the Canadian government shut down the prosecution in advance of his arrest. The center has filed a grievance with the United Nations for Canada's failure to invoke universal jurisdiction to enforce the Convention Against Torture, a petition on which action is pending.