A girl reacts as she receives polio vaccine drops during a house-to-house vaccination campaign in Yemen's capital Sanaa, November 10, 2015. (Photo by Khaled Abdullah/Reuters)
Anti-government protesters react on the grounds of the Mezhyhirya residence of Ukraine's President Viktor Yanukovich in the village Novi Petrivtsi, outside Kiev February 22, 2014. (Photo by Konstantin Chernichkin/Reuters)
A sun bear reacts to triple-digit temperatures at the Henry Doorly Zoo in Omaha, Nebraska, where the temperature reached 103 degrees Fahrenheit on July 6, 2012. (Photo by Nati Harnik/Associated Press)
A demonstrator reacts during a rally following the death in Minneapolis police custody of George Floyd, in Boston, Massachusetts, U.S., June 2, 2020. (Photo by Brian Snyder/Reuters)
Fans react as they watch HBO's “Game of Thrones” series finale at a viewing party at Brennan's bar in Marina del Rey, California, May 19, 2019. (Photo by Robyn Beck/AFP Photo)
Jodie Comer reacts as she wins Outstanding Lead Actress in a Drama Series for “Killing Eve” at the Emmy Awards in Los Angeles, U.S., September 22, 2019. (Photo by Mike Blake/Reuters)
Italy’s Alessia Trost reacts after competing in the women’s high jump during the World Athletics Championships in Doha, Qatar on September 27, 2019. (Photo by Aleksandra Szmigiel/Reuters)
Supporters react as U.S. President Donald Trump walks from Marine One to the White House in Washington, U.S., October 3, 2019. (Photo by Tom Brenner/Reuters)