Relatives of a Palestinian, who was killed at the Israel-Gaza border, react at a hospital in Gaza City, June 18, 2018.

Figure Skating – Pyeongchang 2018 Winter Olympics – Team Event Women's Single Skating Free Skating competition final – Gangneung Ice Arena - Gangneung, South Korea – February 12, 2018 - Mirai Nagasu of the U.S. in action. Image for illustrative purposes

Palestinian demonstrators shout during clashes with Israeli troops at a protest demanding the right to return to their homeland, at the Israel-Gaza border east of Gaza City, April 6, 2018. REUTERS/Mohammed Salem

Luis Acosta holds 5-year-old Angel Jesus, both from Honduras, as a caravan of migrants from Central America en route to the United States crossed through the Suchiate River into Mexico from Guatemala in Ciudad Hidalgo, Mexico, October 29, 2018. Reuters photographer Adrees Latif: "When I arrived to the scene, most of the migrants had already made it to the Mexican side of the river and were resting and drying their clothes along the bank. In the river, dozens of migrant men had locked arms to make a snake-like human cordon from the Guatemalan side to Mexico, so no-one would get swept by its powerful pull. With one camera in hand and a 35 mm lens, I broke into the cordon to photograph the last group of migrants crossing. A family that had made it to the middle of the river was handing their children to other men to help them reach the shore. As a man grabbed the boy in front of me, I followed him, photographing, as he carried him to safety. Moments later, the last set of migrants crossed, and the men who had locked hands in the cordon all swam towards Mexico and started celebrating that everyone in the caravan had made it safely. This photograph begs the question: why would a family leave home and not only risk their own lives but also the lives of their children by doing such extraordinary things? What propels someone to walk without knowing where they will next break bread or quench their thirst?."

Democratic congressional candidate Ilhan Omar is greeted by her husband’s mother after appearing at her midterm election night party in Minneapolis, Minnesota, U.S. November 6, 2018.

Migrants rescued by NGO Proactiva Open Arms rescue boat in central Mediterranean Sea stand on board before arriving at the port of Algeciras in San Roque, southern Spain, August 9, 2018.

An iceberg floats in a fjord near the town of Tasiilaq, Greenland. A team of NASA scientists travelled to Greenland to understand how warming oceans are melting the island's ice from below.

A supporter of Trump and Republican senate candidate Mike Braun attends the election night party in Indianapolis, Indiana, U.S., November 6, 2018. Reuters photographer Chris Bergin: "I saw the colour-coordinated woman in the back of the ball room while covering mid-term elections. She stood out to me because she was lit by a single overhead light that created deep shadows."

2018 Winter Olympics - Pyeongchang, South Korea - Alpine Skiing - Olympics Women's Giant Slalom - Yongpyong Alpine Centre - Pyeongchang, South Korea February 15, 2018 Tessa Worley of France competes.

A four-year-old boy weeps in the arms of a family member as he and others were apprehended by border patrol agents after illegally crossing into the U.S. border from Mexico near McAllen, Texas, U.S., May 2, 2018. Reuters photographer Adrees Latif: "U.S. Border Patrol agents tracked the shoe prints of nine migrants from Central America and Mexico into dense brush along the U.S. Mexican border. When agents encountered the group, most of them were asleep after travelling overnight. As the migrants came out of the brush, I noticed a young boy. His face was full of mosquito bites. The mood became somber as the boy started weeping. His wails echoed through the forest behind us. I would later find out the man he was embracing was his uncle and because he was not a parent, the two soon would be separated. As a parent of young children, this moment in particular has been heart wrenching and leaves me still wondering about the fate of this young boy and his family."

Mahto In The Woods jumps over a small creek on foot while his cousin Jayden Lookinghorse jumps over on his horse on the Cheyenne River Reservation in Green Grass, South Dakota, U.S., May 31, 2018.