Salvador Allende did kill himself but I think Scifo meant to refer to the coup that ousted him from power. According to Wikipedia: "After Pinochet assumed power, U.S. Secretary of State Henry Kissinger told U.S. President Richard Nixon that the U.S. 'didn't do it' (referring to the coup itself) but had 'created the conditions as great as possible', including leading economic sanctions. Recently declassified documents show that the United States government and the CIA had sought the overthrow of Allende in 1970, immediately before he took office ('Project FUBELT'), through the incident that claimed the life of then Commander-in-Chief, General René Schneider, but claims of their direct involvement in the 1973 coup are not proven by publicly available documentary evidence. Many potentially relevant documents still remain classified. See U.S. intervention in Chile." - http://en.wikipedia.org/wiki/Salvador_Allende#The_coup
The parallels to the ouster of Mohammed Mossadegh are quite interesting to note - http://en.wikipedia.org/wiki/Mossadeq#Plot_against_Mossadegh Ironically, if the U.S. had not intervened in 1953 Iran might be a secular democracy today. However, this does not excuse Iran's actions since the Revolution of 1979 and we can only hope that one day democracy will return to the country.