Festival goers on the first day of the Glastonbury Festival at Worthy Farm in Somerset, Britain on June 26, 2019. Glastonbury Festival of Contemporary Performing Arts is a five-day festival of contemporary performing arts that takes place in Pilton, Somerset, west England, from 26 to 30 June 2019. (Photo by Yui Mok/PA Images via Getty Images)

A girl yawns as she and others wait for the start of their first day in school, an occasion known as the Day of Knowledge, in the small town Ignalina, some 110km (68 miles) north of the capital Vilnius, Lithuania, Monday, September 2, 2019. (Photo by Mindaugas Kulbis/AP Photo)

People try to get a roast chicken at the first Costco outlet in China, on the stores opening day in Shanghai on August 27, 2019. China has proved a brutal battleground for overseas food retailers in recent years, with many failing to understand consumer habits and tastes as well as local competitors building a stronger presence. (Photo by Hector Retamal/AFP Photo)

Gymnast Simone Biles performs a flip after throwing out the ceremonial first pitch prior to Game Two of the 2019 World Series between the Houston Astros and the Washington Nationals at Minute Maid Park on October 23, 2019 in Houston, Texas. (Photo by Tim Warner/Getty Images)

A Kashmiri man cover his head with plastic bag as it snows in Srinagar, Indian controlled Kashmir, Thursday, November 7, 2019. The region received its first snow on Wednesday, bringing temperatures down drastically and affecting air and vehicular traffic. (Photo by Mukhtar Khan/AP Photo)

These Arab recruits line up in a barracks square in the British Mandate of Palestine, on December 28, 1940, for their first drill under a British solider. Some 6,000 Palestinian Arabs signed up with the British Army during the course of World War II. (AP Photo)

First lady Michelle Obama (R), joined by daughters Sasha Obama (C) and Malia Obama, is presented with the official White House Christmas Tree on November 25, 2011 in Washington, DC. The tree, a 19-foot-tall balsam fir, was grown on Schroeder's Forevergreens farm near Neshkoro, Wisconsin. (Photo by Brendan Hoffman/Getty Images)

Participants learn how to survive in the wild, including tips on how to make it through a zombie invastion at a “Zombie First Responder” course March 11, 2012 in Sandy, Oregon. In an intensive 2-day curriculum participants train in everything from wilderness and urban survival, nerf or nerd weaponry, stealth and evasion, and proper zombie “disposal”. (Photo by Natalie Behring/Getty Images)