A group of around 400 demonstrators participate in a protest by burying their heads in the sand at Sydney's Bondi Beach November 13, 2014. Hundreds of protesters participated in the event, held ahead of Saturday's G20 summit in Brisbane, which was being promoted as a message to Australian Prime Minister Tony Abbott's government that, “You have your head in the sand on climate change”. (Photo by David Gray/Reuters)

A view of the screen of a ZaZZZ vending machine that contains cannabis flower, hemp-oil energy drinks, and other merchandise at Seattle Caregivers, a medical marijuana dispensary, in Seattle, Washington February 3, 2015. Vending machines selling medical marijuana opened for business in Seattle on Tuesday, in what the company providing them billed as a first-in-the-state innovation that it expects to expand to other cities and states where pot is legal as medicine. (Photo by David Ryder/Reuters)

A participant wearing a costume and make-up attends a Halloween parade at Walibi park in Wavre, Belgium, October 25, 2019. (Photo by Yves Herman/Reuters)

David Goffin of Belgium meets a koala during a promotional event for the Australian Open tennis tournament at Melbourne Park on January 17, 2018. (Photo by Fiona Hamilton/Reuters/Tennis Australia)

Bradley Hemmings and Jenny Sealey MBE pose for the camera with a Giant Iron Man on the set of Iron Man at the Greenwich and Docklands Festival in St Alfege Park on June 24, 2011 in London, England after they are announced by LOCOG as the Artistic Directors for the Paralympic Games Opening Ceremony. (Photo by Christopher Lee/Getty Images)

Jensen a two-year-old False Map turtle, from the Mississippi River, gets used to his new home at Blackpool Sea Life Centre on February 13, 2012 in Blackpool, England. (Photo by Christopher Furlong/Getty Images)

Dancers perform during the Opening Ceremony of the Rio 2016 Olympic Games at Maracana Stadium on August 5, 2016 in Rio de Janeiro, Brazil. (Photo by Jamie Squire/Getty Images)

“Eyes Wide Open is an exhibit created by the American Friends Service Committee observing the American soldiers and marines that have died in the Iraq War. It contains a pair of combat boots to represent every American soldier and marine that has died in the war, as well as shoes representing Iraqi civilians who have lost their lives during the invasion and occupation”. – Wikipedia

Photo: A man pauses as he looks at rows of combat boots that are part of the "Eyes Wide Open" exhibit in front of San Francisco City Hall on March 19, 2012 in San Francisco, California. The Eyes Wide Open exhibition includes a pair of boots for every one of the 481 California servicemen and women who died in the Iraq war. (Photo by Justin Sullivan/Getty Images)