Today, it is almost certain that Iran had a role in the bombing and that its proxy, Hezbollah, almost surely carried it out. Those charges had been made formally in 2006 by an honest and brave special prosecutor, Alberto Nisman. But in 2015 he was assassinated on the day before he was going to charge Ms. Kirchner and other government officials with conducting a cover-up, and to reveal information about the murderous actions of both Iran and Hezbollah.

Mr. Menem and Ms. Kirchner are now senators in the Argentine government, a position that gives them immunity from prosecution. But who have they been protecting? Was Mr. Menem trying to cover up the role of neo-fascist and ultra-right-wing thugs he had placed in important intelligence and security positions? Among the most well known of these notorious figures was Col. Pascual Oscar Guerrieri, who was appointed by Mr. Menem as an adviser to the State Intelligence Agency.

Did Ms. Kirchner sign the memorandum of understanding with the Iranians in exchange for oil and trade? Is that why Argentina — to this day — shamefully maintains diplomatic relations with Iran?

We won’t know the answers to these and many other questions until the mountain of deceit that has been shoveled atop the dead is cleared away. Only at that point will Argentina be able to do justice to their memory. It will be only at that point that their cries will be stilled in my mind.

The dead can’t be brought back to life, of course. But a moral reckoning, and a historical cleansing, can be achieved with further investigation — this time in the open air. And the dead will have a measure of peace, as will their still-grieving survivors.

Avi Weiss, an activist for Jewish causes and human rights, is the founding rabbi of the Hebrew Institute of Riverdale and the founder of the rabbinical schools Yeshivat Chovevei Torah and Yeshivat Maharat.

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