An anti-government demonstrator (left) and a supporter of Brazil's President Dilma Rousseff (right) clash during protests before the appointment of former Brazilian president Luiz Inacio Lula da Silva as chief of staff, near the Planalto Palace in Brasilia, Brazil, on March 17, 2016. #

Demonstrators fill Paulista Avenue during a protest demanding the impeachment of Brazil's President Dilma Rousseff in Sao Paulo, Brazil, on March 13, 2016. The president faces impeachment proceedings over alleged fiscal mismanagement with the country in the throes of the worst recession in decades and amid a sprawling investigation into corruption at the state-run oil giant Petrobras. #

A model presents a creation by Vietnamese designer Nguyen Cong Tri from his Autumn/Winter 2016 collection during Tokyo Fashion Week in Tokyo, Japan, on March 15, 2016. #

Diego Du Charmil, ridden by Sam Twiston-Davies, on his way to winning the Fred Winter Juvenile Handicap Hurdle Race at the Cheltenham Festival, as Campeador, ridden by Barry Geraghty, falls on March 16, 2016. #

Republican presidential candidate U.S. Senator Marco Rubio is hugged by family members following a primary night rally on March 15, 2016, in Miami, Florida. Rubio announced he was suspending his campaign after losing his home state of Florida to Republican rival Donald Trump. #

Refugee children, from left: Zahra Mahmoud, 5, Amna Zughayar, 9, and Ahmad Zughayar, 6, all from from Deir el-Zour, Syria, at an informal tented settlement near the Syrian border on the outskirts of Mafraq, Jordan, on March 11 and 13, 2016. About half of the 4.8 million Syrians who fled their homeland are children, and some of the most vulnerable live in dozens of makeshift tent camps, including in Jordan, which has taken in close to 640,000 refugees. #

An elephant is pictured on March 16, 2016, at the Tsavo East National Park (approximately 337 kilometers south east) of the Kenyan capital, Nairobi. Ten elephants ranging near the high speed standard gauge railway, currently being built across the Tsavos, will be fitted with advanced radio tracking collars that will help conservationists map the pachyderm's migratory tendencies across the new railway to track any disruptions in their natural movement cycles by the multi-billion-dollar project. #

A French Air Force Mirage 2000 fighter jet takes off during the close air support (CAS) exercise Serpentex 2016 hosted by France on the Mediterranean island of Corsica, at Solenzara Air Base, on March 17, 2016. #

Diana, a 10-year-old Syrian girl, whose family fled a suburb of Damascus, stands barefoot due to a lack of shoes, one of the major problems affecting many migrants, on wet stones covering the railway tracks at the northern Greek border station of Idomeni, on March 13, 2016. Bad weather returned and conditions in the refugee camp on the Greek-Macedonian border where about 14,000 people are stranded have further deteriorated, many of its residents struggling to cope with the many challenges posed by the heavy rain. #

Confetti falls as Republican presidential candidate and Ohio Governor John Kasich speaks to supporters at Baldwin Wallace University March 15, 2015, in Berea, Ohio, after he won the Ohio primary. #

A child cries as migrants cross a river, north of Idomeni, Greece, attempting to reach Macedonia on a route that would bypass the border fence, on March 14, 2016. Hundreds of migrants and refugees walked out of an overcrowded camp on the Greek-Macedonian border Monday, determined to use a dangerous crossing to head north. #

Federal appeals court judge Merrick Garland, accompanied by President Barack Obama and Vice President Joe Biden, steps to the microphone as he is introduced as Obama’s nominee for the Supreme Court during an announcement in the Rose Garden of the White House, in Washington, on March 16, 2016. #

The feet and utility belt of what Ivorian security officers said was a dead attacker is seen on the beach in Grand Bassam, Ivory Coast, following a terrorist attack that killed 18 people on March 13, 2016. #

Service towers leave light trails as they move towards the Soyuz TMA-20M for the next International Space Station crew of Jeff Williams of the U.S., and Oleg Skriprochka and Alexey Ovchinin of Russia, at the launchpad ahead of its launch scheduled on March 19 at the Baikonur Cosmodrome, Kazakhstan, on March 16, 2016. #

An aerial view shows cross-country skiers competing during the 48th Engadin Ski Marathon near the village of Sils, Switzerland, on March 13, 2016. According to the organizers, more than 13,000 skiers participated in the 42.2 kilometers (26.2 miles) race between Maloja and S-chanf near the Swiss mountain resort of St. Moritz. #

The United Nations High Commissioner for Refugees Special Envoy Angelina Jolie is surrounded as she visits a shelter for refugees and migrants at the port of Piraeus, near Athens, Greece, on March 16, 2016. #

A general view shows the Chesa Futura, or House of the Future, apartment house designed by the British architect Norman Foster in the Swiss mountain resort of St. Moritz, Switzerland, on March 14, 2016. #

A vehicle burns after an explosion in Ankara, Turkey, following a massive bombing, reportedly carried out by Kurdish rebels, that killed 37 people and injured another 125 on March 13, 2016. #

People look at human remains in the bottom of a mass grave at the San Roque cemetery in Puerto Real near Cadiz, Spain, on March 15, 2016, following a government funded excavation that has determined the executions of hundreds of men and women were carried out from July through October of 1936. #

The North Korean leader Kim Jong-un speaks at an event declaring the construction of Ryomyong Street, in this photo released by North Korea's Korean Central News Agency in Pyongyang on March 18, 2016. #

Aerial view of Pico de Orizaba Mountain blanketed around by smog on March 17, 2016. Mexican authorities on Monday triggered an environmental contingency in the overcrowded Mexico City due to the high concentration of ozone recorded in the metropolis, where they recommended to suspend outdoor activities and ordered to reduce automobile traffic. Mexico City is considered one of the most polluted cities in the world. #

Visitor Roman Zorin touches a 3-D portrait of Russia's President Vladimir Putin at a specialized library for blind and partially sighted people in Krasnoyarsk, Siberia, Russia, on March 15, 2016. The portrait was created specially for blind people to understand how Putin looks like through touch, according to library employees. #

South Korean (blue headbands) and U.S. Marines take positions as amphibious assault vehicles of the South Korean Marine Corps fire smoke bombs during a U.S.-South Korea joint landing operation drill in Pohang, South Korea, on March 12, 2016. #