Decorative model Elephants stand in Trafalgar Square on May 4, 2010 in London, England. 260 of the decorative life size baby Elephants have been designed by established and emerging artists including Paul Smith, Marc Quinn and Julien Macdonald and have been placed across the capital in prominent places such as Buckingham Palace, Parliament Square and Trafalgar Square. (Photo by Dan Kitwood/Getty Images)

People stand under a giant Czech flag as they arrive to light candles at the base of a statue of St. Wenceslas to commemorate the death of former Czech President Vaclav Havel on December 18, 2011 in Prague, Czech Republic. Havel, who led the Velvet Revolution that forced communist rule in Czechoslovakia to crumble in 1989, died in the early morning today in his sleep at the age of 75. (Photo by Sean Gallup/Getty Images)

Volunteers stand and read the morning newspaper while “waiting for the bus” at Henley Beach on January 8, 2012 in Adelaide, Australia. Surrealist artist, Andrew Baines recruited 100 volunteers for this human installation, meant to illustrate corporate workers enjoying nature rather than waiting in a long queue for a trip to work. (Photo by Morne de Klerk/Getty Images)

A worker stands under covered elephant statues at the Ambedkar Park on January 11, 2012 in Noida, Uttar Pradesh, India. India's Election Commission has ordered the covering up of statues, the symbol of the Bahujan Samaj Party, ahead of next month's elections in the state of Uttar Pradesh. (Photo by Daniel Berehulak /Getty Images)

Roof-topping enthusiast Daniel Lau takes a selfie with high-rise buildings down below as he stands on the top of a skyscraper in Hong Kong, China on August 15, 2017. A craze that began in Russia has now taken hold in Hong Kong, one of the world's most vertical cities. Mr Lau said he had been inspired by Russian climbers and that he was unafraid of the vertiginous heights he scales. (Photo by ImagineChina/Rex Features/Shutterstock)

Libyan rebel soldiers watch as they fire rockets (background) toward Libyan government troops near front-line positions April 6, 2011 outside of Brega, Libya. Rebel militias fighting against Libyan government loyalist soldiers continued their stand-off in the eastern Libyan desert today, regaining ground toward a key oil port while awaiting further NATO airstrikes in their quest to unseat longtime Libyan ruler Muammar Gaddafi. (Photo by Chris Hondros/Getty Images)

A member of staff stands in front of a CRH high-speed train at Shanghai Hongqiao Railway Station during its test run on May 11, 2011 in Shanghai, China. After 3 years construction, from April in 2008, with total investment estimated at 220.9 billion yuan (around 32.5 billion U.S. dollars), the Beijing-Shanghai high-speed railway begins a one-month trial operation. It is expected to start operation in June this year, with the travel time between the two cities reducing to five hours from the previous 10. (Photo by ChinaFotoPress/Getty Images)

American actor and politician Ronald Reagan stands behind his wife, actor Jane Wyman, who sits down to dinner, circa 1940s. She is seated between two unidentified men, both in military uniforms adorned with Arms Qualification medals, the man on the right with Sharpshooter and Marksman badges and the man on the left, a Captain, with Expert and Sharpshooter badges. Reagan wears a military uniform with Cavalry branch insignia and Wyman wears a black dress with stranded pearl necklace, and a black hat with a veil. (Photo by Hulton Archive/Getty Images)