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Jan Palach, the 20-year-old Czech student who set himself on fire in Wenceslas Square in 1969 in protest against the Prague Spring.

After the 1968 Soviet-led invasion crushed a period of liberal reforms in Czechoslovakia known as the Prague Spring and the country was taken over by a hard-line communist regime, Janouch was fired from the institute and banned from lecturing.

Only an hour before, she had sent an email to a colleague about plans for the Prague Spring music festival next May.

He was fired after he played a song ridiculing the Soviet troops who invaded Czechoslovakia in 1968 to crush the Prague Spring, the brief period of liberal reforms meant to lead to the democratization of the country.

Moore chose to give Wednesday’s address in the Czech capital, home of the 1968 “Prague Spring” freedom movement that was crushed by Soviet tanks.