Crowds watch as tethered balloons are illuminated by their burners during the night glow evening event on the first day of the Bristol International Balloon Fiesta at the Ashton Court estate on August 6, 2015 in Bristol, England. Now in its 37th year, the Bristol International Balloon Fiesta is Europe's largest annual hot air balloon event in the city that is seen by many balloonists as the home of modern ballooning. (Photo by Matt Cardy/Getty Images)
