Collin Williams (front) and Sarah Putnam of Nevada, protesters affiliated with the Occupy Las Vegas movement, participate in a “zombie walk” on the Las Vegas Strip October 30, 2011 in Las Vegas, Nevada. The demonstrators are protesting what they believe is greed and corruption among banking and business leaders in solidarity with other Occupy movements around the world. (Photo by Ethan Miller/Getty Images)

American free climber Dean Potter walks on a 41-meter-long and two-centimeter-wide slackline over Enshi Grand Canyon at an altitude of 1,800m on April 22, 2012 in Enshi, Hubei Province of China. Potter successfully finished the lone slackline walk in about three minutes without taking any protective measures. (Photo by ChinaFotoPress/ChinaFotoPress)

A beggar who lay at the side of a road pretending he had no legs was moved on by police who made him stand up and walk away. The man lay slumped on his front in Chengdu, in Sichuan Province, China, with his legs tucked under him, and his jeans stretched out to make it appear he had no legs. He is approached by a police officer, who bends down and talks to him for some moments. The officer then reaches out and helps the man to his feet before guiding him across the road. Chengdu is one of a number of cities where officials have tried to clamp down on begging. (Photo by Rex Features)

The Apple l, the first Apple computer made by Steve Jobs and Steve Wozniak in 1976, is seen on display at Sotheby's on June 8, 2012 in New York City. Sotheby's called the computer “an exceptionally rare, working example with original Apple cassette interface, operation manuals and a rare BASIC Users' Manual”. (Photo by Andrew Burton/AFP)

A photographer takes picture of an automotive model during the 36th Bangkok International Motor Show in Bangkok, Thailand, March 24, 2015. No automotive event is complete without the latest offering of high-end cars and motorcycles, and the obligatory accessories stationed at each booth: nubile, young auto-show girls in skimpy, skinsqueezing outfits. This year's Bangkok International Motor Show did not disappoint, attracting a larger horde of eager, flesh-seeking photographers than actual fans of automobiles. (Photo by Jurnasyanto Sukarno/JG Photo)

Models at the Sophia Webster presentation during London Fashion Week Spring Summer 2015 on September 14, 2014 in London, England. (Photo by Anthony Harvey/Getty Images)

Australian model and designer Madeline Stuart, who has Down syndrome, acknowledges attendees after presenting creations from her label 21 Reasons Why By Madeline Stuart during New York Fashion Week in Manhattan, New York, U.S., February 12, 2017. (Photo by Andrew Kelly/Reuters)

Neil Tuckett and Jamie Davidson, begin their attempt to drive a 1911 Model T Ford to the top of Ben Nevis on May 16,2011 in Fort William, Scotland. The challenge has been organised in memory of a pioneering Edinburgh car dealer Henry Alexander, who drove to the top of Ben Nevis to prove the ruggedness of the Model T. The original accent took five days with the route leading over boulders and through snow drifts. (Photo by Jeff J Mitchell/Getty Images)