Honeybees are shown on a frame at beekeeper Denise Hunsaker�s apiary, in Salt Lake City, the US, on May 20, 2019. (Photo by AP)

People watch the sun set over the Hudson River from the Hudson Yards in New York City, the US, on May 20, 2019. (Photo by AFP)

The white coats of doctors lie on the street around the Spanish message "No to the veto," directed at President Mario Abdo Benítez, asking him to not veto a proposed law that would allow doctors, from both the public and private sectors, to partially retire after 25 years of work, in Asuncion, Paraguay, on May 20, 2019. (Photo by AP)

Police officers of the China Immigration Inspection take part in a training session in Shenyang, Liaoning Province, China, on May 20, 2019. (Photo by Reuters)

A migrant looks out at the water, on board the Sea Watch 3 German charity ship, off the coast of Lampedusa, Italy, on May 17, 2019. (Photo by Reuters)

Diego Salamanca, 13, practices his lasso skills at the Rancho del Charro, on the outskirts of Mexico City, Mexico, on May 18, 2019. (Photo by AP)

Boys play with a football made out of plastic waste in the Malembo Village in the Traditional Authority (TA) Khongoni in Lilongwe District in Malawi, on May 16, 2019. (Photo by AFP)

Local residents fill their empty containers with water from a municipal corporation tanker on a hot summer day in Ahmedabad, India, on May 20, 2019. (Photo by Reuters)

An aerial view of Mexico City, Mexico, on May 20, 2019, when visibility is low due to air pollution (photo by AFP)