Evidence that fence and vent marks were drawn on air photos, and holes were made in alleged gas chamber roofs, to support mass gassing claims.

1944 air photos and 1993 camp visit show:
1. 'Smoking Gun' proves photos altered:
Marks on one air photo looking like groups of inmates overlap a roof top, proving they were drawn on the photo.

2. Fence-Like Lines Appear and Disappear and Change Locations:
May, '44 air photos have thick fence-like lines around only one cremation building. July photos have no lines. Whereas on August and September photos, thick lines in different locations from May photos, surround both cremation buildings. This strongly indicates the lines were drawn on the photos.

Three other clues strongly suggest the lines were drawn on the photos:
1. there are no visible shadows, which any object over .6m (2ft.) high would produce on the air photos,
2. under optical equipment which produce 3-D images, the lines display no height,
3. inspection of the camp in 1993 showed no fence foundations, or roots from previous shrubs, existed at these locations.

3. Roof Marks Change Locations, and Holes Smashed Through Roof:
Marks on the two alleged gas chamber roofs are in different locations on the May, July, August, and September air photos, showing they were almost certainly drawn on the photos.

The 1993 inspection of one of the two alleged gas chamber roofs showed no holes existed at the location of marks on 1944 air photos, and two holes were smashed through the cement roof after September, 1944.