This week, Rob Cameron talks to someone with first hand experience of many of the most dramatic moments in 20th century Czechoslovak history - Radio Prague's Olga Szantova. Olga retires - as a full-time member at least - at the end of this year, after a radio career which began in 1961, was interrupted by the arrival of Soviet tanks in 1968, and began again - after almost two decades of selling fruit and knitting jumpers - in 1990. Olga Szantova speaks to Rob Cameron for this week's One on One.