How about finding who took the photo?
Are there pics of the stands up above?
What angle was it taken from?
Was it an individual or is there a camera hanging from the balcony?
If it is a camera, can the Congress access the film of the Congress floor?
Exactly!
Fuck the person who is in the film, find where/who took the pic.
Where is it stored?
Is it stored in Congress?
Do they have access?
Check the angle and if there are cams up there from an installed cam or a network on a balcony.