jenny hill, bbc news, warsaw. helen patton is the granddaughter of the famous world war two us general george patton. shejoins me live from paris is it so important that we continue to commemorate these kind of occasions? well, i think that any time that we can be brought right to the place where something has happened on the day, it becomes heightened in our mind and becomes a milestone for all of us who either witness it live or witness it on the television or on the radio. it gives an occasion for us the radio. it gives an occasion for us to consider where this was on the stage in history and where it was at the time. do you think people appreciate the scale of the sacrifice that people made in world war ii? it is difficult. i make it my business and joy to a certain extent, if you can call it that, to really try to step on those places, to be with those people, or descendants of those who were part of the siege or victims, and that has taught me that there is nothing that compares to actually seeing it all first hand. but i do think obviously we have hollywood and your news programmes, and hopefully good education to bring