What does the Revolutions of 1989 convey about versus veritable democratic republics, such as the United States?

The end of the story was gruesome–a spray of bullets and a splattering of blood on a wall in central Romania. On Christmas Day 1989, after a hastily arranged trial before a kangaroo court, the deposed Romanian dictator Nicolae Ceausescu and his wife, Elena, were executed by a firing squad. The assembled soldiers, eager to eliminate the despised dictator, were ordered not to aim higher than his chest. The faces of the condemned had to be recognizable after the fact. The country had to see that the communist era was over.

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ayatollah khomeini can best be described as the leader who declared iran to be an islamic republic.