German Chancellor Angela Merkel (2nd L) receives an honorary doctorate from University of Nanjing president Chen Jun (2nd R) at the University of the Chinese Academy of Sciences (UCAS) in Beijing on June 12, 2016. The German Chancellor is in China from June 12-14 to attend the fourth Sino-German government consultations. / AFP PHOTO / POOL / HOW HWEE YOUNGHOW HWEE YOUNG/AFP/Getty Images

German Chancellor Angela Merkel speaks during a question and answer session at the University of the Chinese Academy of Sciences (UCAS) after receiving an honorary doctorate from the University of Nanjing in Beijing on June 12, 2016. The German Chancellor is in China from June 12-14 to attend the fourth Sino-German government consultations. / AFP PHOTO / POOL / HOW HWEE YOUNGHOW HWEE YOUNG/AFP/Getty Images

German Chancellor Angela Merkel (L) receives an honorary doctorate from University of Nanjing president Chen Jun (R) at the University of the Chinese Academy of Sciences (UCAS) in Beijing on June 12, 2016. The German Chancellor is in China from June 12-14 to attend the fourth Sino-German government consultations. / AFP PHOTO / POOL / HOW HWEE YOUNGHOW HWEE YOUNG/AFP/Getty Images

This picture taken on June 10, 2016, shows the econso.club website displayed on a computer in Abidjan. econso.club, the first price comparison website to fight against the high cost of living in Ivory Coast, according to trade Minister Jean-Louis Billon and the site instigator Pierre Ngoré, has been unveiled on June 10, 2016, in Abidjan. / AFP PHOTO / Sia KAMBOUSIA KAMBOU/AFP/Getty Images

A handout picture obtained on June 11, 2016 from Solar Impulse 2 shows the Solar Impulse approaching New York City for landing at Kennedy International Airport, with Andre Borshberg at the control. Andre Borschberg took off from Lehigh Valley to New York, the 14th leg of Round the World Journey and marks the final US leg. Departed from Abu Dhabi on march 9th 2015, the Round-the-World Solar Flight will take 500 flight hours and cover 35000 km. Swiss founders and pilots, Bertrand Piccard and André Borschberg hope to demonstrate how pioneering spirit, innovation and clean technologies can change the world. The duo will take turns flying Solar Impulse 2, changing at each stop and will fly over the Arabian Sea, to India, to Myanmar, to China, across the Pacific Ocean, to the United States, over the Atlantic Ocean to Southern Europe or Northern Africa before finishing the journey by returning to the initial departure point. Landings will be made every few days to switch pilots and organize public events for governments, schools and universities. / AFP PHOTO / JEAN REVILLARD / REZO / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / SOLAR IMPULSE 2" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTSJEAN REVILLARD / REZO/AFP/Getty Images

A handout picture obtained on June 11, 2016 from Solar Impulse 2 shows the Solar Impulse approaching New York City for landing at Kennedy International Airport with Andre Borshberg at the control. Andre Borschberg took off from Lehigh Valley to New York, the 14th leg of Round the World Journey and marks the final US leg. Departed from Abu Dhabi on march 9th 2015, the Round-the-World Solar Flight will take 500 flight hours and cover 35000 km. Swiss founders and pilots, Bertrand Piccard and André Borschberg hope to demonstrate how pioneering spirit, innovation and clean technologies can change the world. The duo will take turns flying Solar Impulse 2, changing at each stop and will fly over the Arabian Sea, to India, to Myanmar, to China, across the Pacific Ocean, to the United States, over the Atlantic Ocean to Southern Europe or Northern Africa before finishing the journey by returning to the initial departure point. Landings will be made every few days to switch pilots and organize public events for governments, schools and universities. / AFP PHOTO / JEAN REVILLARD / REZO / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / SOLAR IMPULSE 2" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTSJEAN REVILLARD / REZO/AFP/Getty Images

A handout picture obtained on June 11, 2016 from Solar Impulse 2 shows the Solar Impulse flying past the Statue of Liberty, as it approaches New York City for landing at Kennedy International Airport, with Andre Borshberg at the control. Andre Borschberg took off from Lehigh Valley to New York, the 14th leg of Round the World Journey and marks the final US leg. Departed from Abu Dhabi on march 9th 2015, the Round-the-World Solar Flight will take 500 flight hours and cover 35000 km. Swiss founders and pilots, Bertrand Piccard and André Borschberg hope to demonstrate how pioneering spirit, innovation and clean technologies can change the world. The duo will take turns flying Solar Impulse 2, changing at each stop and will fly over the Arabian Sea, to India, to Myanmar, to China, across the Pacific Ocean, to the United States, over the Atlantic Ocean to Southern Europe or Northern Africa before finishing the journey by returning to the initial departure point. Landings will be made every few days to switch pilots and organize public events for governments, schools and universities. / AFP PHOTO / JEAN REVILLARD / REZO / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / SOLAR IMPULSE 2" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTSJEAN REVILLARD / REZO/AFP/Getty Images

A handout picture obtained on June 11, 2016 from Solar Impulse 2 shows flight crews preparing for the takeoff of the Solar Impulse as it takes off from Lehigh Valley, Pennsylvania with Andre Borshberg at the control. Andre Borschberg took off from Lehigh Valley to New York, the 14th leg of Round the World Journey and marks the final US leg. Departed from Abu Dhabi on march 9th 2015, the Round-the-World Solar Flight will take 500 flight hours and cover 35000 km. Swiss founders and pilots, Bertrand Piccard and André Borschberg hope to demonstrate how pioneering spirit, innovation and clean technologies can change the world. The duo will take turns flying Solar Impulse 2, changing at each stop and will fly over the Arabian Sea, to India, to Myanmar, to China, across the Pacific Ocean, to the United States, over the Atlantic Ocean to Southern Europe or Northern Africa before finishing the journey by returning to the initial departure point. Landings will be made every few days to switch pilots and organize public events for governments, schools and universities. / AFP PHOTO / - / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / SOLAR IMPULSE 2" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS-/AFP/Getty Images