ABACC received with deep regret of the passing away of Ambassador Sérgio de Queiroz Duarte on July 8, 2024, in Belo Horizonte. From 1999 to 2003, he was Permanent Representative of Brazil to the International Atomic Energy Agency. From 2007 to 2012, he was the United Nations High Representative for Disarmament Affairs. In 2017, he assumed the presidency of the non-governmental organization Pugwash, founded in 1957 and awarded the Nobel Peace Prize in 1995.