Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge look through the clock at Musee d'Orsay during an official two-day visit to Paris on March 18, 2017, in Paris, France. #

An Arabian Oryx stands in the Arabian Oryx Sanctuary in Um al-Zamool, near the United Arab Emirates' border with Saudi Arabia on March 24, 2017. The sanctuary stretches over an estimated area of 8,900 square kilometers and currently hosts nearly 155 of the species, which were reintroduced into the its natural habitat in the UAE in a five-year conservation plan launched by UAE's late ruler Sheikh Zayed bin Sultan Al Nahyan, after fears of their extinction. #

Swimmers taking part in the "Sydney Skinny" on March 19, 2017 in Sydney, Australia. The annual nude swim event encourages swimmers to raise money for a number of Australian charities and good causes. #

Flames shoot into the sky from a warehouse storing tank ammunition at a military base in the town of Balaklia (Balakleya), Kharkiv region, Ukraine, on March 23, 2017. #

French President Francois Hollande stands beside a robot on stage as part of the launch of French strategy in artificial intelligence at the Cite des Sciences in Paris, France, on March 21, 2017. #

A woman assists an injured person after an incident on Westminster Bridge in London on March 22, 2017. Reuters photographer Toby Melville was taking pictures around Parliament for stories about Britain's exit from the European Union. Melville was standing below the bridge on the south bank of the River Thames opposite the Houses of Parliament at around 2:30 p.m. when a man fell from the bridge, landing near him. "There was a lot of blood coming from his head. I thought this must be a domestic or horrible accident," Melville said. He immediately phoned the emergency services and decided to go to nearby St Thomas's Hospital to alert doctors about the injured man. He climbed the steps to reach the bridge above, and that's when he saw other injured women lying on the pavement. "At which point I thought this looks like it's more than someone's fallen over the wall," he said. Other bystanders were already rushing to help the victims. At the top of the bridge he began taking pictures. British police say four people were killed and at least 20 injured on Wednesday. A car hit pedestrians on Westminster Bridge, and an attacker stabbed a policeman close to parliament and was shot. "Of a dozen or so people, some of them seemed to be conscious. I didn't know there had been a vehicle involved at the time, someone said 'bus', someone said 'car' someone said 'shooting'," he said. "It was just surreal and it was a fairly quick computation that this was a serious incident and a lot of people injured." #

A member of the public is treated by emergency services near Westminster Bridge and the Houses of Parliament on March 22, 2017 in London, England. An assailant killed three people before he was shot and killed by armed police. #

Smoke rises from a wildfire near homes in Boulder, Colorado, on March 19, 2017. Authorities said the small wildfire burning in the mountains forced people from their homes and filled the sky with smoke. #

A boy rides his bike past destroyed cars and houses in a neighborhood recently liberated by Iraqi security forces, on the western side of Mosul, Iraq, on March 19, 2017. The battle for western Mosul, including the narrow alleyways of the old city, looks to be the most devastating yet for Iraqi civilians trapped between advancing troops and increasingly desperate Islamic State militants. #

People line to to visit the renovated Edicule in the Church of the Holy Sepulchre, traditionally believed to be the site of the crucifixion of Jesus Christ, in Jerusalem on March 21, 2017 A Greek restoration team has completed a historic renovation of the Edicule, the shrine that tradition says houses the cave where Jesus was buried and rose to heaven. #

An overhead view of submersible vessels attempting to salvage the sunken Sewol ferry in waters off Jindo, on March 24, 2017 in Jindo-gun, South Korea. The Sewol sank off the Jindo Island in April 2014 leaving more than 300 people dead. #

Chinese soldiers salute after carry coffins containing the remains of Chinese military personnel who died during the 1950-53 Korean War to the Chinese side at Incheon International Airport on March 22, 2017 in Incheon, South Korea. #

Large pinatas of U.S. President Donald Trump, right, and North Korean leader Kim Jong Un are are torn apart by revelers on the dance floor at Sing Sing Theater in Bangkok, Thailand, on March 19, 2017. The pinatas were filled with free drink tickets and part of an event called "Carnival of Souls" held at the club. #

An opposition fighter from the Failaq al-Rahman brigade fires a heavy machine gun in Jobar, a rebel-held district on the eastern outskirts of the Syrian capital Damascus, on March 19, 2017. #

A visitor simulates nursing a baby while wearing a Virtual Reality headset during the "Laval Virtual" virtual reality, augmented reality, and 3D techonology show on March 22, 2017, in Laval, western France. #

The coffin of former IRA commander and Sinn Fein deputy leader Martin McGuinness is carried to the cemetery in Londonderry, Northern Ireland, on March 23, 2017. McGuinness helped lead his militant movement to compromise with British Protestants. #

Inmates climb to the roof as a fire breaks out during a riot at the youth and men's reformatory, Centro Correccional Etapa II, in San Jose Pinula, Guatemala, on March 19, 2017. At least one man died, a jail monitor, during the riot, according the police spokesman Pablo Castillo. #

Mathilde Gremaud of Switzerland competes in the FIS Snowboarding and Freestyle Skiing World Championships, Women's Slopestyle final, on March 19, 2017, in Sierra Nevada, Spain. #

Charles, Prince of Wales, tours the BAE Systems "Academy For Skills & Knowledge" at Samlesbury, England, meeting staff as well as students and school children exploring the facility. His tour included the Virtual Reality Cave and various workshops. #

The body of a dead migrant in an inflatable boat of the Spanish NGO Proactiva Open Arms, during a search and rescue operation in the central Mediterranean Sea off the Libyan coast, on March 23, 2017. #

Iraqi Kurdish people carry fire torches up a mountain, as they celebrate Newroz Day, a festival marking their spring and new year, in the town of Akra, Iraq, on March 20, 2017. #

Displaced Iraqi men, fleeing fighting between Iraqi security forces and ISIS militants, wait for a security check before being transferred to a camp on the western side of Mosul, Iraq, on March 23, 2017. #

Members of a Syrian family, displaced due to airstrikes, travel with their belongings in a farming vehicle along a road near the town of Tayyibat al-Imam in the countryside of the central province of Hama, which is held by rebel forces. #

Forensic experts and police officers examine the scene following the killing of Denis Voronenkov in Kiev, Ukraine, on March 23, 2017. Ukrainian police said Voronenkov was shot dead Thursday by an unidentified gunman at the entrance of an upscale hotel in the Ukrainian capital. Voronenkov, 45, was a former Russian lawmaker and a critic of Vladimir Putin. He had moved to Ukraine last fall and had been granted Ukrainian citizenship. #

A four-month-old baby polar bear shakes off water at the Hellabrunn Zoo in Munich, Germany, on March 23, 2017, after her naming event. The little bear was named Quintana. #

US President Donald Trump sits in the drivers seat of a semi-truck as he welcomes truckers and CEOs to the White House in Washington, DC, on March 23, 2017, to discuss healthcare. #