BRISTOL, ENGLAND - AUGUST 11: Members of the public watch tethered hot air balloons perform in the 'nightglow' on the opening day of the Bristol International Balloon Fiesta on August 11, 2016 in Bristol, England. The four day event, now in its 38th year, is Europe's largest annual hot air balloon event in the city that is seen as many as the home of modern ballooning. (Photo by Matt Cardy/Getty Images)
BRISTOL, ENGLAND - AUGUST 12: A balloon pilot fires the burners in a tethered hot air balloon on the second day of the Bristol International Balloon Fiesta on August 12, 2016 in Bristol, England. Due to the adverse flying conditions the planned mass ascent at sunrise was cancelled. The four day event, now in its 38th year, is Europe's largest annual hot air balloon event in the city that is seen as many as the home of modern ballooning. (Photo by Matt Cardy/Getty Images)
BRISTOL, ENGLAND - AUGUST 05: Hot air balloons fly into mist and cloud at a preview flight to launch next week's Bristol International Balloon Fiesta on August 5, 2016 in Bristol, England. The four day event event, which will officially open next week on Thursday, is now in its 38th year and is Europe's largest annual hot air balloon event in the city that is seen as many as the home of modern ballooning. (Photo by Matt Cardy/Getty Images)
BRISTOL, ENGLAND - AUGUST 05: Hot air balloons take to the skies at a preview flight to launch next week's Bristol International Balloon Fiesta on August 5, 2016 in Bristol, England. The four day event event, which will officially open next week on Thursday, is now in its 38th year and is Europe's largest annual hot air balloon event in the city that is seen as many as the home of modern ballooning. (Photo by Matt Cardy/Getty Images)
BRISTOL, ENGLAND - AUGUST 05: Hot air balloons fly into mist and cloud at a preview flight to launch next week's Bristol International Balloon Fiesta on August 5, 2016 in Bristol, England. The four day event event, which will officially open next week on Thursday, is now in its 38th year and is Europe's largest annual hot air balloon event in the city that is seen as many as the home of modern ballooning. (Photo by Matt Cardy/Getty Images)
