A bit of a vague question....just for curiosity.
My sister was on holiday in the French alps and while walking over a mountain ridge, she heard a rumbling noise and was then surprised to see two fighter jets flying through the gorge below her. She told me she could clearly see them from above.
Has she discovered a French version of the Mach loop/Rainbow Canyon or is there a well known LFA somewhere in the French alps? I don't recall to have ever seen pictures of such an LFA in France.
Best regards,
Bas