Perón was reunited with another friend from the 1950s – Paraguayan dictator Alfredo Stroessner – on 16 June to sign the bilateral treaty that broke ground on Yacyretá Hydroelectric Dam (the world's second-largest). Perón returned to Buenos Aires with clear signs of pneumonia and, on 28 June, he suffered a series of heart attacks. Isabel was on a trade mission to Europe, but returned urgently and was secretly sworn in on an interim basis on 29 June. Following a promising day at the official presidential residence of Quinta de Olivos in the Buenos Aires suburb of Olivos, Juan Perón suffered a final attack on Monday, 1 July 1974 and died at 13:15. He was 78 years old.
