With the celebrations this week of the seventieth anniversary of the Dambusters Raid, I have special reason to remember one of the other dambuster raids carried out by RAF Bomber Command during the Second World War - the attempt in December 1944 to breach the Urft and Schwammenauel Dams on the Ruhr River, directly in the path of the US 9th Army as it fought through the Hürtgen Forest into Germany ...