DESCRIPTION: An RAF reconnaissance Mosquito has brought back ground level pictures of a larger concrete structure in the Pas de Calais area after two attacks where made on it by RAF 'heavies'. The structure, believed to be connected with the enemy's threatened use of long ranged rockets, was attacked in daylight on July 17th with 12,000 pound bombs, and on the evening of July 20th. The works built at the end of a quarry, where mainly underground; several tunnels led to them and they where topped by a massive concrete dome. In the July 17th attack two, possible three 12,000 pounders burst right on this target. As a result much of the cliff face collapsed and a great deal of the concrete structure around the dome was affected. Tunnels leading to the underground workings, were blocked, railway lines were disrupted and a general subsidence took place in the quarry itself. Todt (?) organisational gant(g?)s were working to repair the damage when the site was photographed after the first attack but this work was upset by Bomber Command's visit on the July 20th, when the main targets were the machiner(y?), railways etc, needed to bring up raw materials to repair the damage. Picture shows: The structure before their attack on July 17th taken by a Mosquito reconnaissance aircraft. (1) shows the concrete dome (2 ) and (3) show Todt organisation workmen moving off into the various tunnels. (Picture issued July 1944)