let's speak now to historian max arthur, thanks for being with us here in the studio in london waiting this ceremony to get underway, of course. the french president paying a national tribute to those who died. and this is the first air money of its kind to remember what something like 20,000 french civilians who died with the allied troops bombed that area of northern france. people forget that, don't they in. >> they do. we had to blitz the area from the reaches upwards. but the germans, in the french population and you know, 20,000 people being killed in their own homes sheltering perhaps is welcoming some ways as one expected really. >> you can understand that, i think for many years afterwards people in that northern part of france actually didn't feel kindly towards the allied troops who obviously lit rated france eventually. but at the time caused so much damage. it was a decision i guess that the commander had his to take. >> had to take on board, plus the fact that the fighting was not easy, just up from the coast. a lot of rear guard action bite germans and strong attacks fro