TULSA, OK - MAY 21: Solar Impulse 2, the solar airplane of Swiss pioneers Bertrand Piccard and Ande Borschberg, in preparation for the take off from Tulsa International Airport, Oklahoma, with André Borschberg at the controls, on 21 May at 4:22am local time (UTC-5). The plane, which is piloted by Borschberg, is expected to land at Dayton International Airport, Ohio, on the same day at around 11:00pm local time (UTC-4). The flight is part of the attempt to achieve the first ever Round-The-World Solar Flight, the goal of which is to demonstrate how modern clean technologies can achieve the impossible.

TULSA, OK - MAY 21: Solar Impulse 2, the solar airplane of Swiss pioneers Bertrand Piccard and André Borschberg, in preparation for the take off from Tulsa International Airport, Oklahoma, with André Borschberg at the controls, on 21 May at 4:22am local time (UTC-5). The plane, which is piloted by Borschberg, is expected to land at Dayton International Airport, Ohio, on the same day at around 11:00pm local time (UTC-4). The flight is part of the attempt to achieve the first ever Round-The-World Solar Flight, the goal of which is to demonstrate how modern clean technologies can achieve the impossible. Christophe Chammartin/ SI2

In this handout photograph released by The Indian Press Information Bureau (PIB) on May 21, 2016, Indian Prime Minister Narendra Modi(R)shakes hands with Apple CEO Tim Cook during a meeting in New Delhi on May 21, 2016. Apple chief executive Tim Cook met with Prime Minister Narendra Modi in New Delhi , launching a new version of the Indian leader's eponymous app on a visit aimed at pushing the technology giant's expansion plans. Cook, shown in a video using the premier's gold-coloured iPhone, launched an update to the Narendra Modi Mobile App to include a new volunteering network, the government said. / AFP PHOTO / PIB / HO / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / PIB" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS HO/AFP/Getty Images

In this handout photograph released by The Indian Press Information Bureau (PIB) on May 21, 2016, Indian Prime Minister Narendra Modi(R)speaks with Apple CEO Tim Cook during a meeting in New Delhi on May 21, 2016. Apple chief executive Tim Cook met with Prime Minister Narendra Modi in New Delhi , launching a new version of the Indian leader's eponymous app on a visit aimed at pushing the technology giant's expansion plans. Cook, shown in a video using the premier's gold-coloured iPhone, launched an update to the Narendra Modi Mobile App to include a new volunteering network, the government said. / AFP PHOTO / PIB / HO / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / PIB" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS HO/AFP/Getty Images

In this handout photograph released by The Indian Press Information Bureau (PIB) on May 21, 2016, Indian Prime Minister Narendra Modi(R)shares a light moment with Apple CEO Tim Cook as they look at his iphone during a meeting in New Delhi on May 21, 2016. Apple chief executive Tim Cook met with Prime Minister Narendra Modi in New Delhi , launching a new version of the Indian leader's eponymous app on a visit aimed at pushing the technology giant's expansion plans. Cook, shown in a video using the premier's gold-coloured iPhone, launched an update to the Narendra Modi Mobile App to include a new volunteering network, the government said. / AFP PHOTO / PIB / HO / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / PIB" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS HO/AFP/Getty Images

In this handout photograph released by The Indian Press Information Bureau (PIB) on May 21, 2016, Indian Prime Minister Narendra Modi (R) speaks with Apple CEO Tim Cook as they look at Modi's iphone during a meeting in New Delhi on May 21, 2016. Apple chief executive Tim Cook met with Prime Minister Narendra Modi in New Delhi , launching a new version of the Indian leader's eponymous app on a visit aimed at pushing the technology giant's expansion plans. Cook, shown in a video using the premier's gold-coloured iPhone, launched an update to the Narendra Modi Mobile App to include a new volunteering network, the government said. / AFP PHOTO / PIB / HO / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / PIB" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS HO/AFP/Getty Images

JERSEY CITY, NJ - MAY 20: (L-R) Brent Saunders, Lieutenant Governor Kim Guadagno, Paul Hoffman, Chirag Patel, Kate Howe, and Steve Howe attend the Liberty Science Center's Genius Gala 5.0 on May 20, 2016 in Jersey City, New Jersey. (Photo by Mike Coppola/Getty Images for Liberty Science Center)

JERSEY CITY, NJ - MAY 20: Liberty Science Center President and CEO, Paul Hoffman (R) with Genius Award Honorees, Physicist Kip Thorne, Professor Ellen Langer, and Paleontologist Jack Horner at the Liberty Science Center's Genius Gala 5.0 on May 20, 2016 in Jersey City, New Jersey. (Photo by Mike Coppola/Getty Images for Liberty Science Center)