WATCH: F-15s perform breathtaking display over Poland

A video of three American F-15 heavy fighter jets refueling along the way to MSPO Expo in Kielce has been released.

MSPO Expo is the biggest defence expo in Poland and the third biggest in Europe. This year, the US was given a prominent status at the event. Some 65 American companies came to showcase their products, while the US Armed Forces send some of its best equipment.

These included the F-15s, the KC-135 Stratotanker aerial refuelling aircraft, P-8 Poseidon maritime patrol aircraft, the M1 Abrams main battle tank, as well as helicopters, the ground-attack Apache, multipurpose Black Hawk and transport Chinook.