Participants react as they observe a fly past during the NATO Summit in Warsaw
(L-R) France's President Francois Hollande, NATO Secretary-General Jens Stoltenberg, Lithuania's President Dalia Grybauskaite, German Chancellor Angela Merkel, Afghanistan's Chief Executive Abdullah Abdullah and Turkey's President Tayyip Erdogan react as they observe a fly past during the NATO Summit in Warsaw, Poland July 8, 2016. REUTERS/Kacper Pempel TPX IMAGES OF THE DAY