Inside Europe: 50 years since Soviet-led invasion of Czechoslovakia

For most Czechs and Slovaks who were alive 50 years ago, the Soviet-led invasion of Czechoslovakia that began the night of August 20, 1968 is etched in their mind. The "Prague Spring" was crushed with the arrival of 2,000 and 500,000 troops. Over 80 civilians were killed. Alexa Dvorson takes us back.