Labourers work at the installation site of Liquefied Petroleum Gas (LPG) pipeline on May Day or Labour Day in Chandigarh, India, May 1, 2015. (Photo by Ajay Verma/Reuters)

A Mai-Mai rebel soldier shows off his guns at a checkpoint near the Mugunga refugee camp in Zaire; 1996. (Photo by Carol Guzy/The Washington Post)

Police officers detain a demonstrator as people protest to defy a ban and march on Taksim Square to celebrate May Day in Istanbul, Turkey on May 1, 2023. (Photo by Dilara Senkaya/Reuters)

Afghan children watch the Kabul view as they stand near to a victim's grave who lost her life in the recent attack on Sayyid al-Shuhada school in west Kabul, Afghanistan, 11 May 2021. Following a terrorist attack on a girls school in Kabul on 08 May that killed some 80 person and injured more than 100, the Afghan government declared 11 May as a national mourning day. (Photo by Hedayatullah Amid/EPA/EFE)

Alessandra Ambrosio arrives for the screening of “The Dead Don't Die” and the Opening Ceremony of the 72nd annual Cannes Film Festival in Cannes, France, 14 May 2019. Presented in competition, the movie opens the festival which runs from 14 to 25 May. (Photo by Ian Langsdon/EPA/EFE)

A person rides on a zip-line descending from the second floor of the Eiffel Tower on May 28, 2019 in Paris. The 800 meter crossing takes one minute at a speed of 90km/h. The zip-line will be opened from May 29 to June 2, 2019. (Photo by Francois Guillot/AFP Photo)

A protester in an Elmo mask dances during the Justice for George Floyd Philadelphia Protest on Saturday, May 30, 2020. Demonstrators took to the streets across the United States to protest the death of Floyd, a black man who was killed in police custody in Minneapolis on May 25. (Photo by Matt Rourke/AP Photo)