Inside Europe: Prague honours a heroine of World War II

Many people have heard of the late Sir Nicholas Winton, the British stockbroker who helped rescue around 700 mostly Jewish children from Nazi-occupied Czechoslovakia in 1939. A plaque has just been unveiled to remember one of Sir Nicholas' colleagues, Doreen Warriner, who may have been instrumental in saving as many as 7,000 people from the Nazis. Rob Cameron reports.