In this May 2016 photo released by The Ocean Agency/XL Catlin Seaview Survey, a boat sails near a coral reef that has been bleached white by heat stress in the Maldives. oral reefs, unique underwater ecosystems that sustain a quarter of the world's marine species and half a billion people, are dying on an unprecedented scale. Scientists are racing to prevent a complete wipeout within decades. (Photo by The Ocean Agency/XL Catlin Seaview Survey via AP Photo)

In this photo provided by Andreas Langreiter via Global-Newsroom, Hannes Arch of Austria performs during the finals of the first stage of the Red Bull Air Race World Championship in Abu Dhabi, United Arab Emirates, Saturday, February 14, 2015. (Photo by Andreas Langreiter/AP Photo/Global-Newsroom)

The 18th Annual Buda County Fair and Weiner Dog Races was held at city park in Buda Sunday April 26, 2015 sponsored by the Lions Club. (Photo by Ralph Barrera/Austin American-Statesman)

The first prototype of the HIRIKO electric car, during the global launch of Hiriko Driving Mobility, at the EU Commssion headquarters on January 24, 2012 in Brussels, Belgium. (Photo by Geert Vanden Wijngaert/Getty Images)

A motorcycle Majestic 350 CC 1931 is displayed on February 5, 2014 at the Grand Palais in Paris on the eve of an auction of luxury vintage cars. (Photo by Francois Guillot/AFP Photo)

Automated guided vehicle robot “Ray” lifts up an Audi car during a pilot project at the parking area of the Audi plant in Ingolstadt, Germany, May 13, 2015. The robot has been designed to help make work more efficient and more comfortable for employees, some whom walk up to eight kilometres a day, while coordinating the finished cars for the subsequent train transportation. “Robot Ray” technology, currently being used at Dusseldorf International Airport in Germany, claims to be able to park 60 per cent more vehicles in one area compared with a human driver. (Photo by Michaela Rehle/Reuters)

People ride a prototype of a driverless vehicle as it is moves through a pedestrian area in Greenwich, east London, February 11, 2015. Britain has begun testing driverless cars in four cities, launching the first official trials ahead of a series of planned rule reviews to accommodate the new technology. (Photo by Suzanne Plunkett/Reuters)