Women tow their hot air balloon during a hot air ballooning event in Todi, Italy, July 29, 2017. REUTERS/Alessandro Bianchi

Crew prepare their hot air balloon before flying during a hot air ballooning event in Todi, Italy, July 29, 2017. REUTERS/Alessandro Bianchi

A man walks next to his hot air balloon before participating in a hot air ballooning event in Todi, Italy, July 29, 2017. REUTERS/Alessandro Bianchi

A man prepares his hot air balloon before flying during a hot air ballooning event in Todi, Italy, July 29, 2017. REUTERS/Alessandro Bianchi TPX IMAGES OF THE DAY

Hot air balloons fly during a hot air ballooning event in Todi, Italy, July 29, 2017. REUTERS/Alessandro Bianchi

Hot air balloons fly during a hot air ballooning event in Todi, Italy, July 29, 2017. REUTERS/Alessandro Bianchi

A hot air balloon flies during a hot air ballooning event in Todi, Italy, July 29, 2017. REUTERS/Alessandro Bianchi

Hot air balloons fly during a hot air ballooning event in Todi, Italy, July 29, 2017. REUTERS/Alessandro Bianchi

Hot air balloons fly during a hot air ballooning event in Todi, Italy, July 29, 2017. REUTERS/Alessandro Bianchi

A hot air balloon flies during a hot air ballooning event in Todi, Italy, July 29, 2017. REUTERS/Alessandro Bianchi

A hot air balloon flies during a hot air ballooning event in Todi, Italy, July 29, 2017. REUTERS/Alessandro Bianchi

Hot air balloons fly during a hot air ballooning event in Todi, Italy, July 29, 2017. REUTERS/Alessandro Bianchi

Hot air balloons fly during a hot air ballooning event in Todi, Italy, July 29, 2017. REUTERS/Alessandro Bianchi

A hot air balloon flies during a hot air ballooning event in Todi, Italy, July 29, 2017. REUTERS/Alessandro Bianchi TPX IMAGES OF THE DAY

Hot air balloons are seen during an Italian hot air ballooning event in Terni, Italy, July 28, 2017. REUTERS/Alessandro Bianchi TPX IMAGES OF THE DAY

Crew members fire up their hot air balloon during an Italian hot air ballooning event in Terni, Italy, July 28, 2017. REUTERS/Alessandro Bianchi

A man fires up his hot air balloon while standing in the basket during an Italian hot air ballooning event in Terni, Italy, July 28, 2017. REUTERS/Alessandro Bianchi

A man fires up the burner of his hot air balloon's during an Italian hot air ballooning event in Terni, Italy, July 28, 2017. REUTERS/Alessandro Bianchi

Hot air balloons are seen during an Italian hot air ballooning event in Terni, Italy, July 28, 2017. REUTERS/Alessandro Bianchi

A man fires up his hot air balloon during an Italian hot air ballooning event in Terni, Italy, July 28, 2017. REUTERS/Alessandro Bianchi

Crew members fire up their hot air balloon during an Italian hot air ballooning event in Terni, Italy, July 28, 2017. REUTERS/Alessandro Bianchi

Crew members fire up their hot air balloon during an Italian hot air ballooning event in Terni, Italy, July 28, 2017. REUTERS/Alessandro Bianchi

A man fires up his hot air balloon during an Italian hot air ballooning event in Terni, Italy, July 28, 2017. REUTERS/Alessandro Bianchi

Crew members prepare their hot air balloon during an Italian hot air ballooning event in Terni, Italy, July 28, 2017. REUTERS/Alessandro Bianchi

Normand Trepanier from Saint-Jean-Sur-Richelieu, Quebec, Canada, pilots the Hot air balloon Piko on day one of the 2015 New Jersey Festival of Ballooning in Readington, New Jersey, July 24, 2015. More than 100 hot air balloons are taking part in the three-day festival, one of the largest of its kind in North America, according to organizers. REUTERS/Mike Segar

A hot air balloon and a shadow of another is seen from a flying balloon above a farm field during a flight just after sunrise on day one of the 2015 New Jersey Festival of Ballooning in Readington, New Jersey, July 24, 2015. More than 100 hot air balloons are taking part in the three-day festival, one of the largest of its kind in North America, according to organizers. REUTERS/Mike Segar

A pilot fills a hot air balloon at sunrise on day one of the 2015 New Jersey Festival of Ballooning in Readington, New Jersey, July 24, 2015. More than 100 hot air balloons are taking part in the three-day festival, one of the largest of its kind in North America, according to organizers. REUTERS/Mike Segar

Hot air balloons in many shapes are seen from a flying balloon just after sunrise on day one of the 2015 New Jersey Festival of Ballooning in Readington, New Jersey, July 24, 2015. More than 100 hot air balloons are taking part in the three-day festival, one of the largest of its kind in North America, according to organizers. REUTERS/Mike Segar

A crew member holds open a hot air balloon as it is inflated at sunrise on day one of the 2015 New Jersey Festival of Ballooning in Readington, New Jersey, July 24, 2015. More than 100 hot air balloons are taking part in the three-day festival, one of the largest of its kind in North America, according to organizers. REUTERS/Mike Segar

Hot air balloons land near a farmhouse as seen from a flying balloon just after sunrise on day one of the 2015 New Jersey Festival of Ballooning in Readington, New Jersey, July 24, 2015. More than 100 hot air balloons are taking part in the three-day festival, one of the largest of its kind in North America, according to organizers. REUTERS/Mike Segar

Two horses run along a farm fence, as seen from a flying hot air balloon, just after sunrise on day one of the 2015 New Jersey Festival of Ballooning in Readington, New Jersey, July 24, 2015. More than 100 hot air balloons are taking part in the three-day festival, one of the largest of its kind in North America, according to organizers. REUTERS/Mike Segar

Hot air balloons are seen just after sunrise on day one of the 2015 New Jersey Festival of Ballooning in Readington, New Jersey, July 24, 2015. More than 100 hot air balloons are taking part in the three-day festival, one of the largest of its kind in North America, according to organizers. REUTERS/Mike Segar

A hot air balloon comes to rest in a farm field, as seen from a flying balloon just after sunrise on day one of the 2015 New Jersey Festival of Ballooning in Readington, New Jersey, July 24, 2015. More than 100 hot air balloons are taking part in the three-day festival, one of the largest of its kind in North America, according to organizers. REUTERS/Mike Segar

A hot air balloon comes to rest amid trees, as seen from a flying balloon just after sunrise on day one of the 2015 New Jersey Festival of Ballooning in Readington, New Jersey, July 24, 2015. More than 100 hot air balloons are taking part in the three-day festival, one of the largest of its kind in North America, according to organizers. REUTERS/Mike Segar TPX IMAGES OF THE DAY

Hot air balloons fly above the trees as seen from a flying balloon just after sunrise on day one of the 2015 New Jersey Festival of Ballooning in Readington, New Jersey, July 24, 2015. More than 100 hot air balloons are taking part in the three-day festival, one of the largest of it's kind in North America, according to organizers. REUTERS/Mike Segar

Hot air balloons are inflated at sunrise on day one of the 2015 New Jersey Festival of Ballooning in Readington, New Jersey, July 24, 2015. More than 100 hot air balloons are taking part in the three-day festival, one of the largest of it's kind in North America, according to organizers. REUTERS/Mike Segar

Hot air balloons are inflated at sunrise on day one of the 2015 New Jersey Festival of Ballooning in Readington, New Jersey, July 24, 2015. More than 100 hot air balloons are taking part in the three-day festival, one of the largest of it's kind in North America, according to organizers. REUTERS/Mike Segar

People hold open a hot air balloon as it is inflated at sunrise on day one of the 2015 New Jersey Festival of Ballooning in Readington, New Jersey, July 24, 2015. More than 100 hot air balloons are taking part in the three-day festival, one of the largest of it's kind in North America according to organizers. REUTERS/Mike Segar

A woman's shadow is cast on the inside of a hot air balloon as it is inflated at sunrise on day one of the 2015 New Jersey Festival of Ballooning in Readington, New Jersey, July 24, 2015. More than 100 hot air balloons are taking part in the three-day festival, one of the largest of it's kind in North America, according to organizers. REUTERS/Mike Segar TPX IMAGES OF THE DAY