The fall of the Berlin Wall, in late ‘89, that signaled the imminent collapse of the Soviet Empire, has got to be the top historical moment.
How can I forget! Hearing from my great aunts and uncles about the importance of the Solidarity movement (not having much of an understanding of politics at the time), and then, a few years later, seeing these same folks cheer when the iron curtain fell, and the REAL Polish Republic returned.