Freddy Moreno (not pictured) checks pigeons with a friend at his balcony in Havana, Cuba, May 25, 2021. Picture taken on May 25, 2021. REUTERS/Alexandre Meneghini

Pigeon fanciers Freddy Moreno (L) and his brother Jackson Canteiro feed pigeons at their balcony in Havana, Cuba, May 25, 2021. Picture taken on May 25, 2021. REUTERS/Alexandre Meneghini

Pigeon fancier Freddy Moreno holds a pigeon inside his home in Havana, Cuba, May 25, 2021. Picture taken on May 25, 2021. REUTERS/Alexandre Meneghini

Pigeon fancier Freddy Moreno plays with pigeons at his balcony in Havana, Cuba, May 25, 2021. Picture taken on May 25, 2021. REUTERS/Alexandre Meneghini

Pigeon fancier Freddy Moreno watches a pigeon at his balcony in Havana, Cuba, May 25, 2021. Picture taken on May 25, 2021. REUTERS/Alexandre Meneghini

Pigeons are seen next to their loft at a balcony in Havana, Cuba, May 25, 2021. Picture taken on May 25, 2021. REUTERS/Alexandre Meneghini

Pigeon fancier Freddy Moreno watches a pigeon leaving its loft at his balcony in Havana, Cuba, May 25, 2021. Picture taken on May 25, 2021. REUTERS/Alexandre Meneghini

Aurelio Tabares poses for a photo next to his model truck in Havana, Cuba, May 20, 2021. Picture taken on May 20, 2021. REUTERS/Alexandre Meneghini

U.S. Rep. Mario Diaz-Balart (R-FL) speaks with House Republican Leader Kevin McCarthy (R-CA) during a news conference to recognize Cuban Independence Day on Capitol Hill in Washington, D.C., U.S. May 20, 2021. REUTERS/Ken Cedeno

House Republican Leader Kevin McCarthy (R-CA), U.S. Rep Maria Elvira Salazar (R-FL), Mario Diaz-Balart (R-FL) and several fellow House Republicans hold a news conference to recognize Cuban Independence Day on Capitol Hill in Washington, D.C., U.S. May 20, 2021. REUTERS/Ken Cedeno

U.S. Rep. Mario Diaz-Balart (R-FL) attends a news conference to recognize Cuban Independence Day on Capitol Hill in Washington, D.C., U.S. May 20, 2021. REUTERS/Ken Cedeno

House Republican Leader Kevin McCarthy (R-CA) leaves after holding a news conference to recognize Cuban Independence Day on Capitol Hill in Washington, D.C., U.S. May 20, 2021. REUTERS/Ken Cedeno

House Republican Leader Kevin McCarthy (R-CA) leaves after holding a news conference to recognize Cuban Independence Day on Capitol Hill in Washington, D.C., U.S. May 20, 2021. REUTERS/Ken Cedeno

House Republican Leader Kevin McCarthy (R-CA), U.S. Rep Maria Elvira Salazar (R-FL), Mario Diaz-Balart (R-FL) and several fellow House Republicans hold a news conference to recognize Cuban Independence Day on Capitol Hill in Washington, D.C., U.S. May 20, 2021. REUTERS/Ken Cedeno

House Republican Leader Kevin McCarthy (R-CA) and several fellow House Republicans (not pictured) hold a news conference to recognize Cuban Independence Day on Capitol Hill in Washington, D.C., U.S. May 20, 2021. REUTERS/Ken Cedeno

U.S. Rep Maria Elvira Salazar (R-FL) speaks during a news conference to recognize Cuban Independence Day on Capitol Hill in Washington, D.C., U.S. May 20, 2021. REUTERS/Ken Cedeno

U.S. Rep. Mario Diaz-Balart (R-FL) speaks with House Republican Leader Kevin McCarthy (R-CA) during a news conference to recognize Cuban Independence Day on Capitol Hill in Washington, D.C., U.S. May 20, 2021. REUTERS/Ken Cedeno

U.S. Rep. Mario Diaz-Balart (R-FL) speaks during a news conference to recognize Cuban Independence Day on Capitol Hill in Washington, D.C., U.S. May 20, 2021. REUTERS/Ken Cedeno

House Republican Leader Kevin McCarthy (R-CA) holds a news conference to recognize Cuban Independence Day on Capitol Hill in Washington, D.C., U.S. May 20, 2021. REUTERS/Ken Cedeno

House Republican Leader Kevin McCarthy (R-CA) and several fellow House Republicans arrive to hold a news conference to recognize Cuban Independence Day on Capitol Hill in Washington, D.C., U.S. May 20, 2021. REUTERS/Ken Cedeno

House Republican Leader Kevin McCarthy (R-CA) and several fellow House Republicans hold a news conference to recognize Cuban Independence Day on Capitol Hill in Washington, D.C., U.S. May 20, 2021. REUTERS/Ken Cedeno

House Republican Leader Kevin McCarthy (R-CA) and several fellow House Republicans hold a news conference to recognize Cuban Independence Day on Capitol Hill in Washington, D.C., U.S. May 20, 2021. REUTERS/Ken Cedeno

Pigeon fanciers Yonisbel Santana (L) and Yosbany De La Rosa watch from their rooftop some of their pigeons flying over Havana, Cuba, May 18, 2021. Picture taken on May 18, 2021. REUTERS/Alexandre Meneghini

Pigeon fancier Yonisbel Santana smokes a cigarette as he holds a pigeon at his rooftop in Havana, Cuba, May 18, 2021. Picture taken on May 18, 2021. REUTERS/Alexandre Meneghini

Pigeons fly over Havana, Cuba, May 18, 2021. Picture taken on May 18, 2021. REUTERS/Alexandre Meneghini

Pigeon fanciers Yonisbel Santana (L) and Yosbany De La Rosa watch from their rooftop some of their pigeons flying over Havana, Cuba, May 18, 2021. Picture taken on May 18, 2021. REUTERS/Alexandre Meneghini

Pigeons fly over Havana, Cuba, May 18, 2021. Picture taken on May 18, 2021. REUTERS/Alexandre Meneghini

Pigeon fancier Yonisbel Santana poses for a photo at his rooftop in Havana, Cuba, May 18, 2021. Picture taken on May 18, 2021. REUTERS/Alexandre Meneghini TPX IMAGES OF THE DAY

People pass in a vintage car in front of a rainbow flag hanging beside a Cuban flag at the Health Ministry building in Havana, Cuba, May 17, 2021. REUTERS/Alexandre Meneghini TPX IMAGES OF THE DAY

Pigeon fancier Pedro Marrero shows a pigeon in his rooftop in Havana, Cuba, May 13, 2021. Picture taken on May 13, 2021. REUTERS/Alexandre Meneghini

Felix Rodriguez wears a protective face mask as he talks to a client beside images of late Cuban President Fidel Castro and Cuba's former President and First Secretary of the Communist Party Raul Castro in a subsidized state store amid concerns about the spread of the coronavirus disease (COVID-19), in Havana, Cuba, May 12, 2021. REUTERS/Alexandre Meneghini

Miguel Jorda, 56, shows his model trains at his home in Havana, Cuba, May 7, 2021. Picture taken on May 7, 2021. REUTERS/Alexandre Meneghini

A banner displaying the portrait of late Cuban President Fidel Castro hangs on the street in downtown Havana, Cuba, May 1, 2021. REUTERS/Alexandre Meneghini

Boats with Cuban flags sail during a protest against the trade embargo on Cuba by the U.S., in Havana, Cuba, April 25, 2021. REUTERS/Alexandre Meneghini/Pool

Florencio Chavez sells herbs for medicine in downtown Havana, Cuba, March 30, 2021. Picture taken on March 30, 2021. REUTERS/Alexandre Meneghini

Chofer Eliasez Mendez buys herbal medicine in Havana, Cuba, April 9, 2021. Picture taken on April 9, 2021. REUTERS/Alexandre Meneghini

An image of late revolutionary hero Ernesto "Che" Guevara is displayed in a pharmacy in Havana, Cuba, April 10, 2021. Picture taken on April 10, 2021. REUTERS/Alexandre Meneghini

A client buys medicine in a pharmacy in Havana, Cuba, April 9, 2021. Picture taken on April 9, 2021. REUTERS/Alexandre Meneghini

People in quarantine stand behind a police line amid concerns about the spread of the coronavirus disease (COVID-19) in Havana, Cuba, April 8, 2021. Picture taken on April 8, 2021. REUTERS/Alexandre Meneghini

People pass by a painting referring to the 62nd anniversary of the Cuban Revolution, in Havana, Cuba, April 16, 2021. Picture taken on April 16, 2021. REUTERS/Alexandre Meneghini

A woman passes by a poster displaying images of late Cuban President Fidel Castro, Cuba's First Secretary of the Communist Party and former President Raul Castro and Cuba's President Miguel Diaz Canel with a sign that reads: "We are continuity", in Havana, Cuba, April 12, 2021. Picture taken April 12, 2021. REUTERS/Alexandre Meneghini

A picture of former Cuban President Raul Castro is displayed in the window of a state building in Havana, Cuba, April 11, 2021. Picture taken April 11, 2021. REUTERS/Alexandre Meneghini

Cuban tanker Petion is seen at a shipyard in Veracruz, Mexico April 9, 2021. Picture taken April 9, 2021. REUTERS/Yahir Ceballos

Cuban tanker Petion is seen at a shipyard in Veracruz, Mexico April 9, 2021. Picture taken April 9, 2021. REUTERS/Yahir Ceballos

Cuban tanker Petion is seen at a shipyard in Veracruz, Mexico April 9, 2021. Picture taken April 9, 2021. REUTERS/Yahir Ceballos

Russia's Deputy Prime Minister Yuri Borisov (L) and his Cuban counterpart Ricardo Cabrisas pose for photos in Havana, Cuba, March 31, 2021. Ernesto Mastrascusa/ Pool via REUTERS

Russia's Deputy Prime Minister Yuri Borisov (R) salutes his Cuban counterpart Ricardo Cabrisas in Havana, Cuba, March 31, 2021. Ernesto Mastrascusa/ Pool via REUTERS

Russia's Deputy Prime Minister Yuri Borisov (L) and his Cuban counterpart Ricardo Cabrisas pose for photos in Havana, Cuba, March 31, 2021. Ernesto Mastrascusa/ Pool via REUTERS

A nurse shows a dose of the Soberana-02 COVID-19 vaccine to be used in a volunteer as part of Phase III trials of the experimental Cuban vaccine candidate, amid concerns about the spread of the coronavirus disease (COVID-19), in Havana, Cuba, March 31, 2021. Jorge Luis Banos/Pool via REUTERS

A nurse prepares a dose of the Soberana-02 COVID-19 vaccine for a volunteer as part of Phase III trials of the experimental Cuban vaccine candidate, amid concerns about the spread of the coronavirus disease (COVID-19), in Havana, Cuba, March 31, 2021. Jorge Luis Banos/Pool via REUTERS

A volunteer receives a dose of the Soberana-02 COVID-19 vaccine, as part of Phase III trials of the experimental Cuban vaccine candidate, amid concerns about the spread of the coronavirus disease (COVID-19), in Havana, Cuba, March 31, 2021. Jorge Luis Banos/Pool via REUTERS

A cameraman films a vital signs monitor during a news conference at the Cuban company Combiomed amid concerns about the spread of the coronavirus disease (COVID-19), in Havana, Cuba, March 31, 2021. REUTERS/Alexandre Meneghini

A vintage car passes by the U.S. Embassy carrying a Cuban flag during a motorcade in protest against the trade embargo on Cuba by the U.S. in Havana, Cuba, March 28, 2021. REUTERS/Alexandre Meneghini

A car passes by the U.S. Embassy carrying Cuban flags during a motorcade in protest against the trade embargo on Cuba by the U.S. in Havana, Cuba, March 28, 2021. REUTERS/Alexandre Meneghini

Cars with Cuban flags ride at the seafront Malecon during a motorcade in protest against the trade embargo on Cuba by the U.S. in Havana, Cuba, March 28, 2021. REUTERS/Alexandre Meneghini

Cars with Cuban flags ride in front of the U.S. Embassy during a motorcade in protest against the trade embargo on Cuba by the U.S. in Havana, Cuba, March 28, 2021. REUTERS/Alexandre Meneghini

People with Cuban flags ride at the seafront Malecon during a motorcade in protest against the trade embargo on Cuba by the U.S. in Havana, Cuba, March 28, 2021. REUTERS/Alexandre Meneghini

People with Cuban flags ride in front of the U.S. Embassy during a motorcade in protest against the trade embargo on Cuba by the U.S. in Havana, Cuba, March 28, 2021. REUTERS/Alexandre Meneghini

Cars with Cuban flags ride in front of the U.S. Embassy during a motorcade in protest against the trade embargo on Cuba by the U.S. in Havana, Cuba, March 28, 2021. REUTERS/Alexandre Meneghini