A member of the Edo Firemanship Preservation Association displays his balancing skills atop bamboo ladders during a New Year demonstration by the fire brigade in Tokyo, Japan, January 6, 2017. (Photo by Toru Hanai/Reuters)

A member of the Edo Firemanship Preservation Association balances on top of a bamboo ladder as he performs a ladder stunt during the New Year's fire review conducted by the Tokyo Fire Department at Tokyo Big Sight on January 6, 2009 in Tokyo, Japan. The annual event, featuring various demonstrations of the latest firefighting and emergency rescue techniques, aims to promote the prevention of fire and disaster. (Photo by Kiyoshi Ota/Getty Images)

Balinese men throw fire on each other during a sacred ritual called “Mesabatan Api” or a fire fight at a temple in Tuban, Bali, Indonesia, 9 October 2014. October 9, 2014. During the ritual Balinese Hindu men took the blazing coconut husks barehanded, swinging and throwing them each other. Balinese believe that fire can destroy evil, and the ritual is aimed to get rid of the negative forces. (Photo by Made Nagi/EPA)

A member of the Philippine National Police stands guard as he detains people as part of the “Rid the Streets Of Drinkers and Youth” operation on a main road in Las Pinas city, metro Manila, Philippines June 1, 2016. (Photo by Romeo Ranoco/Reuters)

A British policewoman chasing after a group of naked street boys by the Serpentine in Hyde Park, London. (Photo by Reg Speller/Getty Images). 1926

Mounted cop in action on Tremont Street in Boston, Massachusetts, 1920 – 1929 (approximate). (Photo by Leslie Jones)

A member of the Fuerza Civil (Civil Force) police unit takes part in a simulated crime situation during a media presentation to show the police model that the federal government wants for the rest of the country, at the police academy in Monterrey December 17, 2014. Fuerza Civil, a tactical team of the police unit trained by the army, was created by the Nuevo Leon government in 2011 to curb down corruption and infiltration by drug gangs in the police corps, local media reported. Promising a new law to stop the infiltration of local governments by organized crime, President Enrique Pena Nieto pledged to reform the penal system and send an proposal to Congress to unify multi-layered police forces in Mexico's 31 states. (Photo by Daniel Becerril/Reuters)

Men wearing costume of traditional firefighters perform acrobatic stunts atop a bamboo ladder following a memorial service for firefighters at Sensoji temple in Tokyo's downtown of Asakusa May 25, 2015. Hundreds of firefighters in traditional costume gathered on Monday for the memorial service for firefighters who were killed performing their duties during the past 300 years. (Photo by Issei Kato/Reuters)