Cuba's President Miguel Diaz-Canel (2-R), former President Raul Castro (C) and former Vice-President Jose Ramon Machado Ventura (L) attend a May Day rally marking International Workers' Day in Havana on May 1, 2026. (Photo by YAMIL LAGE / AFP via Getty Images)

Cuba's President Miguel Diaz-Canel raises a book signed by Cubans as a pledge to the homeland and in defense of national sovereignty, against the US blockade and for peace, during May Day celebrations marking International Workers' Day in Havana on May 1, 2026. (Photo by YAMIL LAGE / AFP via Getty Images)

Britain's King Charles III attends a ceremonial welcome at King's Square in St. George's, Bermuda, on May 1, 2026. King Charles III is in Bermuda for his first visit to a British Overseas Territory as Sovereign. (Photo by Henry NICHOLLS / POOL / AFP via Getty Images)

People march to mark Labor Day at the Anti-Imperialist Tribunal in front of the US Embassy in Havana on May 1, 2026. (Photo by ADALBERTO ROQUE / AFP via Getty Images)

Britain's King Charles III greets people as he arrives for a ceremonial welcome at King's Square in St. George's, Bermuda, on May 1, 2026. King Charles III is in Bermuda for his first visit to a British Overseas Territory as Sovereign. (Photo by Henry Nicholls / POOL / AFP via Getty Images)

Cuba's President Miguel Diaz-Canel (2-R), former President Raul Castro (C) and former Vice-President Jose Ramon Machado Ventura (3-L) attend a May Day rally marking International Workers' Day in Havana on May 1, 2026. (Photo by YAMIL LAGE / AFP via Getty Images)

Cuba's President Miguel Diaz-Canel raises a board showing the number of Cuban signatures pledging commitment to the homeland and defense of national sovereignty, against the US blockade and in favor of peace, during May Day celebrations marking International Workers' Day in Havana on May 1, 2026. (Photo by YAMIL LAGE / AFP via Getty Images)

A vendor displays a ring made of gemstone at a weekly market in the southern Iraqi city of Basra on May 1, 2026. (Photo by HUSSEIN FALEH / AFP via Getty Images)