Subject of Blown-out highlights.jpg 

Hi. I noticed your image Image:Blown-out highlights.jpg. I'm interested in the subject. Is the original image used in an aritcle somewhere? Or could you tell me what is going on - they are flattening something? 

By the way Image:CH Gotthard Basistunnel Amsteg 1.jpg is awesome, if only more tunnels could have images. Cheers,