A member of the mainly Christian “anti-balaka” (anti-machete) militia trains in the Boeing neighbourhood of Bangui, Central African Republic, on February 24, 2014. (Photo by Fred Dufour/AFP Photo)

The photography of Art Wolfe covers the globe, capturing landscapes, wildlife, and cultures from every continent; here he talks through a selection of his favourite images. Art Wolfe is an American photographer and conservationist. His photographs have been noted by environmental advocacy groups for their “stunning” visual impact. Here: Snowy owlets (Bubo scandiacus), Arctic National Wildlife Refuge, Alaska, USA. (Photo by Art Wolfe/Art Wolfe Stock)

An Armatix employee holds a “smart gun” by the company at the Armatix headquarters in Munich May 14, 2014. The gun is implanted with an electronic chip that allows it to be fired only if the shooter is wearing a watch that communicates with it through a radio signal. If the gun is moved more than 10 inches (25 cm) from the watch, it will not fire. A Maryland gun shop owner has dropped his plan to be the first in the United States to sell the so-called “smart gun” after a backlash that included death threats. (Photo by Michael Dalder/Reuters)

Hospitality staff members laugh as they stand on Tiananmen Square before the closing ceremony of China's 19th Party Congress at the Great Hall of the People in Beijing, Tuesday, October 24, 2017. The ruling Communist Party on Tuesday formally lifted Xi Jinping's status to China's most powerful ruler in decades, setting the stage for the authoritarian leader to tighten his grip over the country while pursuing an increasingly muscular foreign policy and military expansion. (Photo by Mark Schiefelbein/AP Photo)

Jennifer Lawrence reacts as she poses backstage with her Oscar after winning the best actress award for her role in “Silver Linings Playbook” at the 85th Academy Awards in Hollywood, California, February 24, 2013. Lawrence reacted to some photographers telling her to watch her step as she went onto the platform. (Photo by Mike Blake/Reuters)

Guatemalan wrestlers and relatives carry the coffin of late eighteen-year-old wrestler Laisha Cameros, known as “La Hija del Zorro” who was shot dead during an assault two days ago, during her funeral at the General Cemetery in Guatemala City on February 11, 2019. Cameros was a victim of an armed attack at Limon neighborhood where Mara Salvatrucha and Barrio 18 gangs operate. (Photo by Johan Ordóñez/AFP Photo)

The 29-year-old English actress Kimberley Garner is seen in Cannes, France on May 20, 2019. (Photo by The Mega Agency)

Chrissy Teigen and daughter Luna Stephens seen on the streets of Manhattan on June 24, 2019 in New York City. (Photo by James Devaney/GC Images)