(L–R) Unknown, Alan Jones, Chrissie Hynde, Vivienne Westwood and punk fashion icon Jordan at Kings Road fashion shop «Sеx» run by Westwood and Malcolm McLaren in London, United Kingdom, 1976. (Photo by David Dagley/Rex Features/Shutterstock)

A demonstration on March 15, 1922 on Palace Roof, 57th Street and 7th Avenue, showing the shellproof steel jacket. Leo Krause wearing the jacket, which weighs 12 pounds. Shots used, 38 and 45 calibre, at close range. (Photo by Bettmann Archive)

National Guardsmen are put through riot training in Boston's Commonwealth Armory on Friday, October 18, 1974. Massachusetts Gov. Francis W. Sargent called up the guard to quell school violence, but the city has been relatively calm and the guard has remained in the armories. (Photo by JWG/AP Photo)

Hungarians witness the fallen statue of communist leader Josef Stalin in front of the National Theater in Budapest on October 24, 1956. Demonstrators revolting against communist rule in Hungary pulled the statue to the ground at Dozsa Gyorgy on Oct. 23 and hauled it by tractor to Blaha Lujza where it was later smashed to pieces by the people. (Photo by Arpad Hazafi/AP Photo)

A clock showing a countdown to the start of the London 2012 Olympics is unveiled on March 14, 2011 in London, England. The clock is starting five hours from midnight when 6.6 million tickets for the Olympics will become available and 500 days before the Games start. There is a six-week window to apply for tickets on the London 2012 website.

Zookeepers measure the length of a pueblan milk snake in the Reptile House of ZSL London Zoo as part of their annual weighing and measuring of their animals on August 25, 2011 in London, England. The heights and weights of over 750 different animal species at the zoo are recorded into the International Species Information System, to monitor their health and share the data with other zoos across the world. (Photo by Oli Scarff/Getty Images)

A man inspects a plastic cover placed over an artwork attributed to Banksy on May 17, 2012 in London, England. The stencilled image depicts a poor child making Union Jack flags on a sewing machine and is located on the wall of a Poundland discount shop in the Wood Green area of north London. (Photo by Peter Macdiarmid)