German Air Force Eurofighter Typhoon jet escorts the plane carrying Britain’s King Charles as it arrives in Berlin Brandenburg Airport 'Willy Brandt' in Berlin, Germany, March 29, 2023. REUTERS/Phil Noble 

German Air Force Eurofighter Typhoon jet escorts the plane carrying Britain’s King Charles as it arrives in Berlin Brandenburg Airport 'Willy Brandt' in Berlin, Germany, March 29, 2023. REUTERS/Phil Noble 

German Air Force Eurofighter Typhoon jet escorts the plane carrying Britain’s King Charles as it arrives in Berlin Brandenburg Airport 'Willy Brandt' in Berlin, Germany, March 29, 2023. REUTERS/Phil Noble 

German Air Force Eurofighter Typhoon jet escorts the plane carrying Britain’s King Charles as it arrives in Berlin Brandenburg Airport 'Willy Brandt' in Berlin, Germany, March 29, 2023. REUTERS/Phil Noble 

German Air Force Eurofighter Typhoon jet escorts the plane carrying Britain’s King Charles as it arrives in Berlin Brandenburg Airport 'Willy Brandt' in Berlin, Germany, March 29, 2023. REUTERS/Phil Noble 

German Air Force Eurofighter Typhoon jet escorts the plane carrying Britain’s King Charles as it arrives in Berlin Brandenburg Airport 'Willy Brandt' in Berlin, Germany, March 29, 2023. REUTERS/Phil Noble 

Smoke hangs above St. Peter's Basilica from the aerobatic demonstration team of the Italian Air Force, The Frecce Tricolori ("Tricolor Arrows") as they perform to mark the 100th anniversary of the foundation of the Italian military air force, in Rome, Italy March 28, 2023. REUTERS/Remo Casilli 

Smoke hangs in the sky from the aerobatic demonstration team of the Italian Air Force, The Frecce Tricolori ("Tricolor Arrows") as they perform to mark the 100th anniversary of the foundation of the Italian military air force, in Rome, Italy March 28, 2023. REUTERS/Remo Casilli 

The aerobatic demonstration team of the Italian Air Force the "Frecce Tricolori" (Tricolor Arrows) performs to mark the 100th anniversary of the foundation of the Italian military air force in Rome, Italy March 28, 2023. REUTERS/Remo Casilli 

The aerobatic demonstration team of the Italian Air Force the "Frecce Tricolori" (Tricolor Arrows) performs to mark the 100th anniversary of the foundation of the Italian military air force in Rome, Italy March 28, 2023. REUTERS/Remo Casilli 

The aerobatic demonstration team of the Italian Air Force the "Frecce Tricolori" (Tricolor Arrows) performs to mark the 100th anniversary of the foundation of the Italian military air force in Rome, Italy March 28, 2023. REUTERS/Remo Casilli 

The aerobatic demonstration team of the Italian Air Force the "Frecce Tricolori" (Tricolor Arrows) performs to mark the 100th anniversary of the foundation of the Italian military air force in Rome, Italy March 28, 2023. REUTERS/Remo Casilli 

The aerobatic demonstration team of the Italian Air Force the "Frecce Tricolori" (Tricolor Arrows) performs to mark the 100th anniversary of the foundation of the Italian military air force in Rome, Italy March 28, 2023. REUTERS/Remo Casilli 

The aerobatic demonstration team of the Italian Air Force the "Frecce Tricolori" (Tricolor Arrows) performs to mark the 100th anniversary of the foundation of the Italian military air force in Rome, Italy March 28, 2023. REUTERS/Remo Casilli 

The aerobatic demonstration team of the Italian Air Force the "Frecce Tricolori" (Tricolor Arrows) performs to mark the 100th anniversary of the foundation of the Italian military air force in Rome, Italy March 28, 2023. REUTERS/Remo Casilli TPX IMAGES OF THE DAY 

The aerobatic demonstration team of the Italian Air Force the "Frecce Tricolori" (Tricolor Arrows) performs to mark the 100th anniversary of the foundation of the Italian military air force in Rome, Italy March 28, 2023. REUTERS/Remo Casilli 

Hellenic Air Force helicopters fly during a military parade marking Greece's Independence Day, in Athens, Greece March 25, 2023. REUTERS/Louiza Vradi 

A crew member from a C-130 Hercules of Taiwan Air Force, transporting members of the media, looks out a window after landing in Taipei, Taiwan March 25, 2023. REUTERS/Carlos Garcia Rawlins 

U.S. President Joe Biden and first lady Jill Biden exit off of Air Force One at Delaware Air National Guard Base in New Castle, Delaware, U.S. March 24, 2023. REUTERS/Ken Cedeno 

U.S. President Joe Biden and first lady Jill Biden exit off of Air Force One at Delaware Air National Guard Base in New Castle, Delaware, U.S. March 24, 2023. REUTERS/Ken Cedeno 

U.S. President Joe Biden and first lady Jill Biden exit off of Air Force One at Delaware Air National Guard Base in New Castle, Delaware, U.S. March 24, 2023. REUTERS/Ken Cedeno 

U.S. President Joe Biden and first lady Jill Biden exit off of Air Force One at Delaware Air National Guard Base in New Castle, Delaware, U.S. March 24, 2023. REUTERS/Ken Cedeno 

U.S. President Joe Biden and first lady Jill Biden exit off of Air Force One at Delaware Air National Guard Base in New Castle, Delaware, U.S. March 24, 2023. REUTERS/Ken Cedeno 

U.S. President Joe Biden and first lady Jill Biden exit off of Air Force One at Delaware Air National Guard Base in New Castle, Delaware, U.S. March 24, 2023. REUTERS/Ken Cedeno 

U.S. President Joe Biden and U.S. first lady Jill Biden disembark from Air Force One at MacDonald-Cartier International Airport in Ottawa, Ontario, Canada March 23, 2023. REUTERS/Blair Gable 

U.S. President Joe Biden and U.S. first lady Jill Biden disembark from Air Force One at MacDonald-Cartier International Airport in Ottawa, Ontario, Canada March 23, 2023. REUTERS/Blair Gable 

U.S. President Joe Biden and U.S. first lady Jill Biden disembark from Air Force One at MacDonald-Cartier International Airport in Ottawa, Ontario, Canada March 23, 2023. REUTERS/Blair Gable 

U.S. President Joe Biden and U.S. first lady Jill Biden disembark from Air Force One at MacDonald-Cartier International Airport in Ottawa, Ontario, Canada March 23, 2023. REUTERS/Kevin Lamarque 

NATO Secretary General Jens Stoltenberg shakes hands with German Air Force lieutenant general Ingo Gerhartz on the official opening day of a new multinational air tanker fleet terminal in Eindhoven, Netherlands March 23, 2023. REUTERS/Piroschka van de Wouw 

U.S Secretary of the Air Force Frank Kendall speaks at the Singapore Defence Technology Summit in Singapore March 23, 2023. REUTERS/Edgar Su 

U.S Secretary of the Air Force Frank Kendall speaks at the Singapore Defence Technology Summit in Singapore March 23, 2023. REUTERS/Edgar Su 

U.S Secretary of the Air Force Frank Kendall speaks at the Singapore Defence Technology Summit in Singapore March 23, 2023. REUTERS/Edgar Su 

U.S Secretary of the Air Force Frank Kendall speaks at the Singapore Defence Technology Summit in Singapore March 23, 2023. REUTERS/Edgar Su 

U.S. President Joe Biden and First Lady Jill Biden board Air Force One at Delaware Air National Guard Base in New Castle, Delaware, U.S. March 12, 2023. REUTERS/Ken Cedeno 

U.S. President Joe Biden and First Lady Jill Biden board Air Force One at Delaware Air National Guard Base in New Castle, Delaware, U.S. March 12, 2023. REUTERS/Ken Cedeno 

U.S. President Joe Biden and First Lady Jill Biden board Air Force One at Delaware Air National Guard Base in New Castle, Delaware, U.S. March 12, 2023. REUTERS/Ken Cedeno 

U.S. President Joe Biden and First Lady Jill Biden board Air Force One at Delaware Air National Guard Base in New Castle, Delaware, U.S. March 12, 2023. REUTERS/Ken Cedeno 

U.S. President Joe Biden and first lady Jill Biden arrive to board Air Force One at Delaware Air National Guard Base in New Castle, Delaware, U.S. March 12, 2023. REUTERS/Ken Cedeno 

U.S. President Joe Biden boards Air Force One at Delaware Air National Guard Base in New Castle, Delaware, U.S. March 12, 2023. REUTERS/Ken Cedeno 

U.S. President Joe Biden and his granddaughter Natalie Biden board Air Force One at Delaware Air National Guard Base in New Castle, Delaware, U.S. March 12, 2023. REUTERS/Ken Cedeno 

U.S. President Joe Biden and his granddaughter Natalie Biden board Air Force One at Delaware Air National Guard Base in New Castle, Delaware, U.S. March 12, 2023. REUTERS/Ken Cedeno 

U.S. President Joe Biden walks to board Air Force One at Delaware Air National Guard Base in New Castle, Delaware, U.S. March 12, 2023. REUTERS/Ken Cedeno 

U.S. President Joe Biden walks to board Air Force One at Delaware Air National Guard Base in New Castle, Delaware, U.S. March 12, 2023. REUTERS/Ken Cedeno 

A fence is seen in a field at a restricted area by the Spanish government in the town of Palomares, as Spain has officially asked the U.S. to remove some soil from the area to help cleanup efforts after the town was the site of a 1966 nuclear accident in which a mid-air collision between two U.S. Air Force planes resulted in the release of radioactive plutonium-239 from undetonated hydrogen bombs over different areas in Palomares, near Almeria, southern Spain March 7, 2023. REUTERS/Jon Nazca 

A sign that reads, "The sea belongs to everyone. Do not get it dirty!. No Trash!", is seen on the shore of Quitapellejos beach in the Mediterranean Sea in the town of Palomares, as Spain has officially asked the U.S. to remove some soil from the area to help cleanup efforts after the town was the site of a 1966 nuclear accident in which a mid-air collision between two U.S. Air Force planes resulted in the release of radioactive plutonium-239 from undetonated hydrogen bombs over different areas in Palomares, near Almeria, southern Spain March 7, 2023. REUTERS/Jon Nazca 

A watchtower is seen on the shore of Quitapellejos beach in the Mediterranean Sea in the town of Palomares, as Spain has officially asked the U.S. to remove some soil from the area to help cleanup efforts after the town was the site of a 1966 nuclear accident in which a mid-air collision between two U.S. Air Force planes resulted in the release of radioactive plutonium-239 from undetonated hydrogen bombs over different areas in Palomares, near Almeria, southern Spain March 7, 2023. REUTERS/Jon Nazca 

Information panels are seen near the shore of Quitapellejos beach in the town of Palomares, as Spain has officially asked the U.S. to remove some soil from the area to help cleanup efforts after the town was the site of a 1966 nuclear accident in which a mid-air collision between two U.S. Air Force planes resulted in the release of radioactive plutonium-239 from undetonated hydrogen bombs over different areas in Palomares, near Almeria, southern Spain March 7, 2023. REUTERS/Jon Nazca 

A man stands on the shore of Quitapellejos beach in the Mediterranean Sea in the town of Palomares, as Spain has officially asked the U.S. to remove some soil from the area to help cleanup efforts after the town was the site of a 1966 nuclear accident in which a mid-air collision between two U.S. Air Force planes resulted in the release of radioactive plutonium-239 from undetonated hydrogen bombs over different areas in Palomares, near Almeria, southern Spain March 7, 2023. REUTERS/Jon Nazca 

The Mediterranean Sea is seen from the Quitapellejos beach in the town of Palomares, as Spain has officially asked the U.S. to remove some soil from the area to help cleanup efforts after the town was the site of a 1966 nuclear accident in which a mid-air collision between two U.S. Air Force planes resulted in the release of radioactive plutonium-239 from undetonated hydrogen bombs over different areas in Palomares, near Almeria, southern Spain March 7, 2023. REUTERS/Jon Nazca 

A non-pass sign is seen on a fence in a field at a restricted area by the Spanish government in the town of Palomares, as Spain has officially asked the U.S. to remove some soil from the area to help cleanup efforts after the town was the site of a 1966 nuclear accident in which a mid-air collision between two U.S. Air Force planes resulted in the release of radioactive plutonium-239 from undetonated hydrogen bombs over different areas in Palomares, near Almeria, southern Spain March 7, 2023. REUTERS/Jon Nazca 

Non-pass signs are seen on a fence in a field at a restricted area by the Spanish government in the town of Palomares, as Spain has officially asked the U.S. to remove some soil from the area to help cleanup efforts after the town was the site of a 1966 nuclear accident in which a mid-air collision between two U.S. Air Force planes resulted in the release of radioactive plutonium-239 from undetonated hydrogen bombs over different areas in Palomares, near Almeria, southern Spain March 7, 2023. REUTERS/Jon Nazca 

A fence is seen in a field at a restricted area (back) by the Spanish government in the town of Palomares, as Spain has officially asked the U.S. to remove some soil from the area to help cleanup efforts after the town was the site of a 1966 nuclear accident in which a mid-air collision between two U.S. Air Force planes resulted in the release of radioactive plutonium-239 from undetonated hydrogen bombs over different areas in Palomares, near Almeria, southern Spain March 7, 2023. REUTERS/Jon Nazca 

Caravans of tourists are seen parked near the shore of Quitapellejos beach in the Mediterranean Sea in the town of Palomares, as Spain has officially asked the U.S. to remove some soil from the area to help cleanup efforts after the town was the site of a 1966 nuclear accident in which a mid-air collision between two U.S. Air Force planes resulted in the release of radioactive plutonium-239 from undetonated hydrogen bombs over different areas in Palomares, near Almeria, southern Spain March 7, 2023. REUTERS/Jon Nazca 

A buoy and a plastic bottle are seen from the Quitapellejos beach in the Mediterranean Sea in the town of Palomares, as Spain has officially asked the U.S. to remove some soil from the area to help cleanup efforts after the town was the site of a 1966 nuclear accident in which a mid-air collision between two U.S. Air Force planes resulted in the release of radioactive plutonium-239 from undetonated hydrogen bombs over different areas in Palomares, near Almeria, southern Spain March 7, 2023. REUTERS/Jon Nazca 

Vegetation and soil are seen in a field at a restricted area by the Spanish government in the town of Palomares, as Spain has officially asked the U.S. to remove some soil from the area to help cleanup efforts after the town was the site of a 1966 nuclear accident in which a mid-air collision between two U.S. Air Force planes resulted in the release of radioactive plutonium-239 from undetonated hydrogen bombs over different areas in Palomares, near Almeria, southern Spain March 7, 2023. REUTERS/Jon Nazca 

A non-pass sign is seen on a fence in a field at a restricted area by the Spanish government in the town of Palomares, as Spain has officially asked the U.S. to remove some soil from the area to help cleanup efforts after the town was the site of a 1966 nuclear accident in which a mid-air collision between two U.S. Air Force planes resulted in the release of radioactive plutonium-239 from undetonated hydrogen bombs over different areas in Palomares, near Almeria, southern Spain March 7, 2023. REUTERS/Jon Nazca 

A girl picks up a rock from the shore of Quitapellejos beach in the Mediterranean Sea in the town of Palomares, as Spain has officially asked the U.S. to remove some soil from the area to help cleanup efforts after the town was the site of a 1966 nuclear accident in which a mid-air collision between two U.S. Air Force planes resulted in the release of radioactive plutonium-239 from undetonated hydrogen bombs over different areas in Palomares, near Almeria, southern Spain March 7, 2023. REUTERS/Jon Nazca 

A non-pass sign is seen on a fence in a field at a restricted area by the Spanish government in the town of Palomares, as Spain has officially asked the U.S. to remove some soil from the area to help cleanup efforts after the town was the site of a 1966 nuclear accident in which a mid-air collision between two U.S. Air Force planes resulted in the release of radioactive plutonium-239 from undetonated hydrogen bombs over different areas in Palomares, near Almeria, southern Spain March 7, 2023. REUTERS/Jon Nazca 

A metallic pylon is seen in a field at a restricted area by the Spanish government in the town of Palomares, as Spain has officially asked the U.S. to remove some soil from the area to help cleanup efforts after the town was the site of a 1966 nuclear accident in which a mid-air collision between two U.S. Air Force planes resulted in the release of radioactive plutonium-239 from undetonated hydrogen bombs over different areas in Palomares, near Almeria, southern Spain March 7, 2023. REUTERS/Jon Nazca 

A non-pass sign is seen on a fence in a field at a restricted area by the Spanish government in the town of Palomares, as Spain has officially asked the U.S. to remove some soil from the area to help cleanup efforts after the town was the site of a 1966 nuclear accident in which a mid-air collision between two U.S. Air Force planes resulted in the release of radioactive plutonium-239 from undetonated hydrogen bombs over different areas in Palomares, near Almeria, southern Spain March 7, 2023. REUTERS/Jon Nazca