Three helicopters fly above Army Hall in Sarajevo, Bosnia and Herzegovina, May 9, 2016. The fly-over, a traditional military honor, was part of a ceremony to recognize European Union Day, which is held every year to celebrate peace and unity in Europe. The purpose of the ceremony was to publicly and jointly remember the important role that EUFOR plays in support of BiH as well as commemorate all those who lost their lives while supporting the collective stability for a peaceful future.