Getting the timelines right, regarding the treaties and so on, is the next step. The photographic inventory is less important at this point.
Some exhibits feature controversies without forcing the viewer into a point of view e.g. Douma (OPCW scandal), Skripals (novichok on door knob), Navalny (novichok in underwear).
We find lots of deception when it comes to who is short-circuiting what agreements, and so the museum has to structure some of the exhibits as debates among competing theories of truth.
