"We are being jammed . . . We are being jammed . . . When you hear the Czech national anthem you will know it's all over."
-- Radio Prague, August 1968
The last surge of reformist fervor in Czechoslovakia ended abruptly the night of Aug. 20, 1968, when some 500,000 soldiers from five Warsaw Pact nations flooded across the borders. As the invading armies advanced on Prague, elite paramilitary units of the KGB landed at the capital's Ruzyne Airport, then fanned out and secured key transportation and communication centers. Czechoslovak citizens awoke to find the streets of all major cities...