Swiss Airforce Patrouille Suisse F-5E Tiger II , Mollis, Switzerland. Taken during a training session in the Glarner Alps. This formation is called Shadow. I have seen them doing this both with gear down and gear up.
Lens – Nikkor AF-S VR 70-300mm/4.5-5.6G IF-ED
ISO – 400
Patrouille Suisse F-5E Tiger II