A customer adjusts a gun at the MOA exhibition, where exhibitors will showcase military, outdoor, and airsoft equipment in Taipei, Taiwan, November 27, 2020. REUTERS/Ann Wang

A customer adjusts a gun at the MOA exhibition, where exhibitors will showcase military, outdoor, and airsoft equipment in Taipei, Taiwan, November 27, 2020. REUTERS/Ann Wang

A Taiwan flag can be seen with rockets at the MOA exhibition, where exhibitors will showcase military, outdoor, and airsoft equipment in Taipei, Taiwan, November 27, 2020. REUTERS/Ann Wang

Smoke billows from the sites of Saudi-led air strikes in Sanaa, Yemen November 27, 2020. REUTERS/Khaled Abdullah

Smoke billows from the sites of Saudi-led air strikes in Sanaa, Yemen November 27, 2020. REUTERS/Khaled Abdullah

Smoke billows from the sites of Saudi-led air strikes in Sanaa, Yemen November 27, 2020. REUTERS/Khaled Abdullah

U.S. President Donald Trump arrives to a Thanksgiving video teleconference with members of the military forces at the White House in Washington, U.S., November 26, 2020. REUTERS/Erin Scott

U.S. President Donald Trump participates in a Thanksgiving video teleconference with members of the military forces at the White House in Washington, U.S., November 26, 2020. REUTERS/Erin Scott TPX IMAGES OF THE DAY

U.S. President Donald Trump speaks to reporters after participating in a Thanksgiving video teleconference with members of the military forces at the White House in Washington, U.S., November 26, 2020. REUTERS/Erin Scott

U.S. President Donald Trump arrives to a Thanksgiving video teleconference with members of the military forces at the White House in Washington, U.S., November 26, 2020. REUTERS/Erin Scott

U.S. President Donald Trump participates in a Thanksgiving video teleconference with members of the military forces at the White House in Washington, U.S., November 26, 2020. REUTERS/Erin Scott

U.S. President Donald Trump speaks to reporters after participating in a Thanksgiving video teleconference with members of the military forces at the White House in Washington, U.S., November 26, 2020. REUTERS/Erin Scott

U.S. President Donald Trump participates in a Thanksgiving video teleconference with members of the military forces at the White House in Washington, U.S., November 26, 2020. REUTERS/Erin Scott

U.S. President Donald Trump speaks to reporters after participating in a Thanksgiving video teleconference with members of the military forces at the White House in Washington, U.S., November 26, 2020. REUTERS/Erin Scott

U.S. President Donald Trump arrives to a Thanksgiving video teleconference with members of the military forces at the White House in Washington, U.S., November 26, 2020. REUTERS/Erin Scott

U.S. President Donald Trump speaks to reporters after he participated in a Thanksgiving video teleconference with members of the military forces at the White House in Washington, U.S., November 26, 2020. REUTERS/Erin Scott

U.S. President Donald Trump speaks to reporters after he participated in a Thanksgiving video teleconference with members of the military forces at the White House in Washington, U.S., November 26, 2020. REUTERS/Erin Scott

U.S. President Donald Trump speaks to reporters after he participated in a Thanksgiving video teleconference with members of the military forces at the White House in Washington, U.S., November 26, 2020. REUTERS/Erin Scott

U.S. President Donald Trump speaks as he participates in a Thanksgiving video teleconference with members of the military forces at the White House in Washington, U.S., November 26, 2020. REUTERS/Erin Scott

U.S. President Donald Trump speaks to reporters after he participated in a Thanksgiving video teleconference with members of the military forces at the White House in Washington, U.S., November 26, 2020. REUTERS/Erin Scott

U.S. President Donald Trump speaks as he participates in a Thanksgiving video teleconference with members of the military forces at the White House in Washington, U.S., November 26, 2020. REUTERS/Erin Scott

U.S. President Donald Trump speaks to reporters after he participated in a Thanksgiving video teleconference with members of the military forces at the White House in Washington, U.S., November 26, 2020. REUTERS/Erin Scott

U.S. President Donald Trump speaks to reporters after he participated in a Thanksgiving video teleconference with members of the military forces at the White House in Washington, U.S., November 26, 2020. REUTERS/Erin Scott

U.S. President Donald Trump speaks to reporters after he participated in a Thanksgiving video teleconference with members of the military forces at the White House in Washington, U.S., November 26, 2020. REUTERS/Erin Scott

U.S. President Donald Trump speaks to reporters after he participated in a Thanksgiving video teleconference with members of the military forces at the White House in Washington, U.S., November 26, 2020. REUTERS/Erin Scott

U.S. President Donald Trump speaks to reporters after he participated in a Thanksgiving video teleconference with members of the military forces at the White House in Washington, U.S., November 26, 2020. REUTERS/Erin Scott

U.S. President Donald Trump speaks to reporters after he participated in a Thanksgiving video teleconference with members of the military forces at the White House in Washington, U.S., November 26, 2020. REUTERS/Erin Scott

U.S. President Donald Trump speaks to reporters after he participated in a Thanksgiving video teleconference with members of the military forces at the White House in Washington, U.S., November 26, 2020. REUTERS/Erin Scott

U.S. President Donald Trump speaks to reporters after he participated in a Thanksgiving video teleconference with members of the military forces at the White House in Washington, U.S., November 26, 2020. REUTERS/Erin Scott

U.S. President Donald Trump speaks to reporters after he participated in a Thanksgiving video teleconference with members of the military forces at the White House in Washington, U.S., November 26, 2020. REUTERS/Erin Scott

U.S. President Donald Trump speaks to reporters after he participated in a Thanksgiving video teleconference with members of the military forces at the White House in Washington, U.S., November 26, 2020. REUTERS/Erin Scott

U.S. President Donald Trump speaks as he participates in a Thanksgiving video teleconference with members of the military forces at the White House in Washington, U.S., November 26, 2020. REUTERS/Erin Scott

U.S. President Donald Trump arrives to participate in a Thanksgiving video teleconference with members of the military forces at the White House in Washington, U.S., November 26, 2020. REUTERS/Erin Scott

U.S. President Donald Trump arrives to participate in a Thanksgiving video teleconference with members of the military forces at the White House in Washington, U.S., November 26, 2020. REUTERS/Erin Scott

U.S. President Donald Trump gestures as he participates in a Thanksgiving video teleconference with members of the military forces at the White House in Washington, U.S., November 26, 2020. REUTERS/Erin Scott

U.S. President Donald Trump gestures as he participates in a Thanksgiving video teleconference with members of the military forces at the White House in Washington, U.S., November 26, 2020. REUTERS/Erin Scott TPX IMAGES OF THE DAY

U.S. President Donald Trump gestures as he participates in a Thanksgiving video teleconference with members of the military forces at the White House in Washington, U.S., November 26, 2020. REUTERS/Erin Scott

U.S. President Donald Trump participates in a Thanksgiving video teleconference with members of the military forces at the White House in Washington, U.S., November 26, 2020. REUTERS/Erin Scott

Cadets of the Special Military School of Saint-Cyr stand in front of the French-flag-draped coffin of late Daniel Cordier, Jean Moulin's secretary, former French resistance member, and veteran with the medaille des Compagnons de la Liberation (Order of the Liberation Companion), during a national ceremony to pay tribute to him, at the Hotel National des Invalides in Paris, France, November 26, 2020. REUTERS/Gonzalo Fuentes

Cadets of the Special Military School of Saint-Cyr carry the French-flag-draped coffin of late Daniel Cordier, Jean Moulin's secretary, former French resistance member, and veteran with the medaille des Compagnons de la Liberation (Order of the Liberation Companion), during a national ceremony to pay tribute to him, at the Hotel National des Invalides in Paris, France, November 26, 2020. REUTERS/Gonzalo Fuentes

Miomir Korac, lead archaeologist, poses for a picture at the remains of Roman legion's headquarters at the ancient city of Viminacium, near Kostolac, Serbia, November 25, 2020. Picture taken November 25, 2020. REUTERS/Marko Djurica

An archaeologist excavates the remains of Roman legion's headquarters at the ancient city of Viminacium, near Kostolac, Serbia, November 25, 2020. Picture taken November 25, 2020. REUTERS/Marko Djurica

Silver coins found at the remains of a Roman legion's headquarters are seen at the ancient city of Viminacium, near Kostolac, Serbia, November 25, 2020. Picture taken November 25, 2020. REUTERS/Marko Djurica

Archaeologists excavate the remains of Roman legion's headquarters at the ancient city of Viminacium, near Kostolac, Serbia, November 25, 2020. Picture taken November 25, 2020. REUTERS/Marko Djurica

Archaeologists excavate the remains of Roman legion's headquarters at the ancient city of Viminacium, near Kostolac, Serbia, November 25, 2020. Picture taken November 25, 2020. REUTERS/Marko Djurica

Archaeologists excavate the remains of Roman legion's headquarters at the ancient city of Viminacium, near Kostolac, Serbia, November 25, 2020. Picture taken November 25, 2020. Picture taken with a drone. REUTERS/Marko Djurica

Archaeologists excavate the remains of Roman legion's headquarters at the ancient city of Viminacium, near Kostolac, Serbia, November 25, 2020. Picture taken November 25, 2020. Picture taken with a drone. REUTERS/Marko Djurica

Archaeologists excavate the remains of Roman legion's headquarters at the ancient city of Viminacium, near Kostolac, Serbia, November 25, 2020. Picture taken November 25, 2020. Picture taken with a drone. REUTERS/Marko Djurica

Archaeologists excavate the remains of Roman legion's headquarters at the ancient city of Viminacium, near Kostolac, Serbia, November 25, 2020. Picture taken November 25, 2020. Picture taken with a drone. REUTERS/Marko Djurica

Men smoke cigarettes at a square in the city of Sirte, Libya November 22, 2020. Picture taken November 22, 2020. REUTERS/Esam Omran Al-Fetori

A man stands in front of a clothing store in the city of Sirte, Libya November 22, 2020. Picture taken November 22, 2020. REUTERS/Esam Omran Al-Fetori

The entrance to the meeting hall of the 5+5 Military Committee is pictured in Sirte, Libya November 22, 2020. Picture taken November 22, 2020. REUTERS/Esam Omran Al-Fetori

People leave a store in Sirte, Libya November 22, 2020. Picture taken November 22, 2020. REUTERS/Esam Omran Al-Fetori

A security man stands at the entrance to the meeting hall of the 5+5 Military Committee in Sirte, Libya November 22, 2020. Picture taken November 22, 2020. REUTERS/Esam Omran Al-Fetori

A poster of the Libyan military commander Khalifa Haftar is seen at the entrance to the city in Sirte, Libya November 22, 2020. Picture taken November 22, 2020. REUTERS/Esam Omran Al-Fetori

Men pray at a square in the city of Sirte, Libya November 22, 2020. Picture taken November 22, 2020. REUTERS/Esam Omran Al-Fetori

A general view shows Hadrut town, which recently came under the control of Azerbaijan's troops following a military conflict against ethnic Armenian forces and a further signing of a ceasefire deal, in the region of Nagorno-Karabakh, November 25, 2020. Picture taken November 25, 2020. REUTERS/Aziz Karimov

Azeri service members pose for a picture as they rest in an abandoned house in Hadrut town, which recently came under the control of Azerbaijan's troops following a military conflict against ethnic Armenian forces and a further signing of a ceasefire deal, in the region of Nagorno-Karabakh, November 25, 2020. Picture taken November 25, 2020. REUTERS/Aziz Karimov

An Azeri service member plays the piano as his fellow soldiers surround him in an abandoned house in Hadrut town, which recently came under the control of Azerbaijan's troops following a military conflict against ethnic Armenian forces and a further signing of a ceasefire deal, in the region of Nagorno-Karabakh, November 25, 2020. Picture taken November 25, 2020. REUTERS/Aziz Karimov

A board with an image of Azeri President Ilham Aliyev is on display in Hadrut town, which recently came under the control of Azerbaijan's troops following a military conflict against ethnic Armenian forces and a further signing of a ceasefire deal, in the region of Nagorno-Karabakh, November 25, 2020. Picture taken November 25, 2020. REUTERS/Aziz Karimov