Photographs of the area of 'attack' by air services on 29 July 1921. To ensure Americans got the picture General Mitchell ordered that the"photographic section ... will have sufficient airplanes, properly equipped with personnel and both moving and still cameras to secure photographs and moving pictures of the simulated attack upon New York."

("Bombing Raid on Eastern Cities", The Aircraft Journal.)

The left of the photograph shows the place where the World Trade Centre was later built.