A man arranges a display of cacti during preparations for the RHS Chelsea Flower Show in London, Britain May 21, 2016. (Photo by Neil Hall/Reuters)

A woman is tattooed during the Great British Tattoo Show in Alexandra Palace in north London, Britain May 23, 2015. (Photo by Neil Hall/Reuters)

A model poses beside a Mazda MX-5 during a media presentation at the 37th Bangkok International Motor Show in Bangkok, Thailand, March 22, 2016. (Photo by Chaiwat Subprasom/Reuters)

Wizz Air's Airbus A-321 flying along the Danibe river during an air show in Budapest, Hungary, May 1, 2016. (Photo by Laszlo Balogh/Reuters)

The new Citroen Concept Car Divine DS is presented at the 2014 Paris Auto Show on October 2, 2014 in Paris on the first of the two press days. European carmakers are hoping to impress with new models at this week's Paris Motor Show and prove they have come out stronger from years of economic trouble and cost-cutting. (Photo by Miguel Medina/AFP Photo)

A 3D printing professional wears his T-Rex skull creation during a 3D printing show in Brussels, Belgium, October 18, 2015. (Photo by Eric Vidal/Reuters)

The 2019 Nissan Altima sits covered before being presented at the New York Auto Show in the Manhattan borough of New York City, New York, U.S., March 28, 2018. (Photo by Brendan McDermid/Reuters)

Models prepare themselves backstage ahead of the International Dwarf Fashion Show, on September 26, 2017 in Paris, France. (Photo by Thomas Samson/AFP Photo)