Liberation of Europe. Allied Bombers Attack Pas De Calais Target This picture is one of a series showing the results of Allied air-attacks on a large constructional works in the Pas De Calais area similar to the large site recently captured in the Cherbourg Peninsular. The target consisted of a large concrete structure and a number of ancillary buildings probably associated with it. These and other similar sites have been attacked form time to time by aircraft of R.A.F. Bomber Command and U.S.