Ukrainian service members walk on the tarmac of an airfield during joint air drills conducted by Ukrainian and U.S. special operation military forces, as part of a broader cooperation aimed at enhancing interoperability between divisions, near Vinnytsia, Ukraine September 18, 2020. REUTERS/Gleb Garanich

A CV-22 tiltrotor aircraft flies during joint air drills conducted by Ukrainian and U.S. special operation military forces, as part of a broader cooperation aimed at enhancing interoperability between divisions, near Vinnytsia, Ukraine September 18, 2020. REUTERS/Gleb Garanich

A hole in the wall of a house of Mohamed Al-Shoukry who was displaced during the war, is seen at his destroyed home during clashes, in Al-Khela, south of the capital, Tripoli, Libya July 5, 2020. Picture taken July 5, 2020. REUTERS/Ayman Sahely

U.S. service members are seen onboard a MC-130J aircraft during joint air drills conducted by Ukrainian and U.S. special operation military forces, as part of a broader cooperation aimed at enhancing interoperability between divisions, near Vinnytsia, Ukraine September 18, 2020. REUTERS/Gleb Garanich

A building damaged during the clashes, is seen in Al-Khela, south of the capital, Tripoli, Libya July 5, 2020. Picture taken July 5, 2020. REUTERS/Ayman Sahely

Clothes of a family who were displaced during the war are seen on the ground of their destroyed home, in Al-Khela, south of the capital, Tripoli, Libya July 5, 2020. Picture taken July 5, 2020. REUTERS/Ayman Sahely

A family who was displaced during the war, passes by damaged buildings, as they return home in Al-Khela, south of the capital, Tripoli, Libya July 5, 2020. Picture taken July 5, 2020. REUTERS/Ayman Sahely

A building, damaged during the clashes, is seen in Al-Khela, south of the capital, Tripoli, Libya July 5, 2020. Picture taken July 5, 2020. REUTERS/Ayman Sahely

A building, damaged during the clashes is seen in Al-Khela, south of the capital, Tripoli, Libya July 5, 2020. Picture taken July 5, 2020. REUTERS/Ayman Sahely

A general view of buildings damaged during the clashes, in Al-Khela, south of the capital, Tripoli, Libya July 5, 2020. Picture taken July 5, 2020. REUTERS/Ayman Sahely

A civilian vehicle destroyed during the clashes is seen in Al-Khela, south of the capital, Tripoli, Libya July 5, 2020. Picture taken July 5, 2020. REUTERS/Ayman Sahely

Shops destroyed during the war are seen in Al-Khela, south of the capital, Tripoli, Libya July 5, 2020. Picture taken July 5, 2020. REUTERS/Ayman Sahely

A building, damaged during the clashes, is seen in Al-Khela, south of the capital, Tripoli, Libya July 5, 2020. Picture taken July 5, 2020. REUTERS/Ayman Sahely

Nasser Al-Droubi who was displaced during the war checks his house destroyed during the clashes, after returning home in Al-Khela, south of the capital, Tripoli, Libya July 5, 2020. Picture taken July 5, 2020. REUTERS/Ayman Sahely

A sign warning about mines is seen in Al-Khela, south of the capital, Tripoli, Libya July 5, 2020. Picture taken July 5, 2020. REUTERS/Ayman Sahely

Mohamed Al-Shoukry who was displaced during the war looks at the wall of his destroyed house, after returning home in Al-Khela, south of the capital, Tripoli, Libya July 5, 2020. Picture taken July 5, 2020. REUTERS/Ayman Sahely

Nasser Al-Droubi who was displaced during the war checks his home destroyed during the clashes, after returning home in Al-Khela, south of the capital, Tripoli, Libya July 5, 2020. Picture taken July 5, 2020. REUTERS/Ayman Sahely

A shop, destroyed during the clashes, of families who were displaced during the war is seen in Al-Khela, south of the capital, Tripoli, Libya July 5, 2020. Picture taken July 5, 2020. REUTERS/Ayman Sahely

Bullet casings from clashes are seen on the ground in Al-Khela, south of the capital, Tripoli, Libya July 5, 2020. Picture taken July 5, 2020. REUTERS/Ayman Sahely

Nasser Al-Droubi who was displaced during the war checks his house destroyed during the clashes, after returning home, in Al-Khela, south of the capital, Tripoli, Libya July 5, 2020. Picture taken July 5, 2020. REUTERS/Ayman Sahely

A building, damaged during the clashes, is seen in Al-Khela, south of the capital, Tripoli, Libya July 5, 2020. Picture taken July 5, 2020. REUTERS/Ayman Sahely

A shop, damaged during the clashes, is seen in Al-Khela, south of the capital, Tripoli, Libya July 5, 2020. Picture taken July 5, 2020. REUTERS/Ayman Sahely

A U.S. service member jumps with a parachute during joint air drills conducted by Ukrainian and U.S. special operation military forces, as part of a broader cooperation aimed at enhancing interoperability between divisions, near Vinnytsia, Ukraine September 18, 2020. REUTERS/Gleb Garanich

A child, who was displaced with his family during the war, is seen at his family's destroyed shop, after returning home in Al-Khela, south of the capital, Tripoli, Libya July 5, 2020. Picture taken July 5, 2020. REUTERS/Ayman Sahely

U.S. service members jump with parachutes during joint air drills conducted by Ukrainian and U.S. special operation military forces, as part of a broader cooperation aimed at enhancing interoperability between divisions, near Vinnytsia, Ukraine September 18, 2020. REUTERS/Gleb Garanich

U.S. service members jump with parachutes during joint air drills conducted by Ukrainian and U.S. special operation military forces, as part of a broader cooperation aimed at enhancing interoperability between divisions, near Vinnytsia, Ukraine September 18, 2020. REUTERS/Gleb Garanich

U.S. service members jump with parachutes from a MC-130J aircraft during joint air drills conducted by Ukrainian and U.S. special operation military forces, as part of a broader cooperation aimed at enhancing interoperability between divisions, near Vinnytsia, Ukraine September 18, 2020. REUTERS/Gleb Garanich

A U.S. service member jumps with a parachute from a MC-130J aircraft during joint air drills conducted by Ukrainian and U.S. special operation military forces, as part of a broader cooperation aimed at enhancing interoperability between divisions, near Vinnytsia, Ukraine September 18, 2020. REUTERS/Gleb Garanich

A U.S. crew member is seen onboard a MC-130J aircraft during joint air drills conducted by Ukrainian and U.S. special operation military forces, as part of a broader cooperation aimed at enhancing interoperability between divisions, near Vinnytsia, Ukraine September 18, 2020. REUTERS/Gleb Garanich

U.S. service members wait before jumping with parachutes onboard a MC-130J aircraft during joint air drills conducted by Ukrainian and U.S. special operation military forces, as part of a broader cooperation aimed at enhancing interoperability between divisions, near Vinnytsia, Ukraine September 18, 2020. REUTERS/Gleb Garanich

U.S. service members wait before jumping with parachutes onboard a MC-130J aircraft during joint air drills conducted by Ukrainian and U.S. special operation military forces, as part of a broader cooperation aimed at enhancing interoperability between divisions, near Vinnytsia, Ukraine September 18, 2020. REUTERS/Gleb Garanich

U.S. service members wait before jumping with parachutes onboard a MC-130J aircraft during joint air drills conducted by Ukrainian and U.S. special operation military forces, as part of a broader cooperation aimed at enhancing interoperability between divisions, near Vinnytsia, Ukraine September 18, 2020. REUTERS/Gleb Garanich

U.S. service members are seen onboard a MC-130J aircraft during joint air drills conducted by Ukrainian and U.S. special operation military forces, as part of a broader cooperation aimed at enhancing interoperability between divisions, near Vinnytsia, Ukraine September 18, 2020. REUTERS/Gleb Garanich

A hawk flies above a CV-22 tiltrotor aircraft during joint air drills conducted by Ukrainian and U.S. special operation military forces, as part of a broader cooperation aimed at enhancing interoperability between divisions, near Vinnytsia, Ukraine September 18, 2020. REUTERS/Gleb Garanich

Service members check an aircraft during joint air drills conducted by Ukrainian and U.S. special operation military forces, as part of a broader cooperation aimed at enhancing interoperability between divisions, near Vinnytsia, Ukraine September 18, 2020. REUTERS/Gleb Garanich

Ukrainian service members board a CV-22 tiltrotor aircraft during joint air drills conducted by Ukrainian and U.S. special operation military forces, as part of a broader cooperation aimed at enhancing interoperability between divisions, near Vinnytsia, Ukraine September 18, 2020. REUTERS/Gleb Garanich

CV-22 tiltrotor aircraft fly above an airfield during joint air drills conducted by Ukrainian and U.S. special operation military forces, as part of a broader cooperation aimed at enhancing interoperability between divisions, near Vinnytsia, Ukraine September 18, 2020. REUTERS/Gleb Garanich

U.S. service members walk on the tarmac before boarding an aircraft during joint air drills conducted by Ukrainian and U.S. special operation military forces, as part of a broader cooperation aimed at enhancing interoperability between divisions, near Vinnytsia, Ukraine September 18, 2020. REUTERS/Gleb Garanich

Ukrainian service members walk on the tarmac before boarding a CV-22 tiltrotor aircraft during joint air drills conducted by Ukrainian and U.S. special operation military forces, as part of a broader cooperation aimed at enhancing interoperability between divisions, near Vinnytsia, Ukraine September 18, 2020. REUTERS/Gleb Garanich

Members of the medical staff, wearing protective suits and face masks, treat a patient suffering from the coronavirus disease (COVID-19) at the Intensive Care Unit (ICU) of the military hospital Laveran in Marseille, France, September 18, 2020. REUTERS/Eric Gaillard

A medical staff member walks in the emergency unit at the military hospital Laveran in Marseille, France, September 18, 2020. REUTERS/Eric Gaillard

A doctor talks with medical staff wearing protective suits and face masks, at the coronavirus disease (COVID-19) Unit of the military hospital Laveran in Marseille, France, September 18, 2020. REUTERS/Eric Gaillard

A doctor talks with medical staff wearing protective suits and face masks, at the coronavirus disease (COVID-19) Unit of the military hospital Laveran in Marseille, France, September 18, 2020. REUTERS/Eric Gaillard

A member of the medical staff, wearing a protective suit and a face mask, looks out of a room with a patient suffering from the coronavirus disease (COVID-19) at the Intensive Care Unit (ICU) of the military hospital Laveran in Marseille, France, September 18, 2020. REUTERS/Eric Gaillard

Members of the medical staff, wearing protective suits and face masks, treat a patient suffering from the coronavirus disease (COVID-19) at the Intensive Care Unit (ICU) of the military hospital Laveran in Marseille, France, September 18, 2020. REUTERS/Eric Gaillard

Members of the medical staff, wearing protective suits and face masks, prepare to enter a room with a patient suffering from the coronavirus disease (COVID-19) at the Intensive Care Unit (ICU) of the military hospital Laveran in Marseille, France, September 18, 2020. REUTERS/Eric Gaillard

Members of the medical staff, wearing protective suits and face masks, prepare to enter a room with a patient suffering from the coronavirus disease (COVID-19) at the Intensive Care Unit (ICU) of the military hospital Laveran in Marseille, France, September 18, 2020. REUTERS/Eric Gaillard

Members of the medical staff, wearing protective suits and face masks, treat a patient suffering from the coronavirus disease (COVID-19) in the Intensive Care Unit (ICU) of the military hospital Laveran in Marseille, France, September 18, 2020. REUTERS/Eric Gaillard

Members of the medical staff, wearing protective suits and face masks, treat a patient suffering from the coronavirus disease (COVID-19) in the Intensive Care Unit (ICU) of the military hospital Laveran in Marseille, France, September 18, 2020. REUTERS/Eric Gaillard

Members of the medical staff, wearing protective suits and face masks, prepare to enter a room with a patient suffering from the coronavirus disease (COVID-19) in the Intensive Care Unit (ICU) of the military hospital Laveran in Marseille, France, September 18, 2020. REUTERS/Eric Gaillard

Members of the medical staff, wearing protective suits and face masks, treat a patient suffering from the coronavirus disease (COVID-19) in the Intensive Care Unit (ICU) of the military hospital Laveran in Marseille, France, September 18, 2020. REUTERS/Eric Gaillard

Members of the medical staff, wearing protective suits and face masks, treat a patient suffering from the coronavirus disease (COVID-19) in the Intensive Care Unit (ICU) of the military hospital Laveran in Marseille, France, September 18, 2020. REUTERS/Eric Gaillard

A woman wearing a protective face mask, waits at the testing site of the military hospital Laveran in Marseille, France, September 18, 2020. REUTERS/Eric Gaillard

Chief of military protocol Reto Senn wears a protective face mask ahead of an official welcome ceremony for Austrian Chancellor Sebastian Kurz, outside the Lohn Estate in Kehrsatz near Bern, Switzerland, September 18, 2020. REUTERS/Denis Balibouse

Chief of military protocol Reto Senn wears a protective face mask ahead of an official welcome ceremony, outside the Lohn Estate in Kehrsatz near Bern, Switzerland, September 18, 2020. REUTERS/Denis Balibouse

U.S. service members gather near armoured vehicles during the Noble Partner 2020 multinational military exercises conducted by Georgian, British, French, Polish and U.S. troops at Vaziani firing ground outside Tbilisi, Georgia September 18, 2020. REUTERS/Irakli Gedenidze

Georgia's President Salome Zurabishvili wearing a protective face mask attends a ceremony closing the Noble Partner 2020 multinational military exercises conducted by Georgian, British, French, Polish and U.S. troops at Vaziani firing ground outside Tbilisi, Georgia September 18, 2020. REUTERS/Irakli Gedenidze

Polish service members take part in a ceremony closing the Noble Partner 2020 multinational military exercises conducted by Georgian, British, French, Polish and U.S. troops at Vaziani firing ground outside Tbilisi, Georgia September 18, 2020. REUTERS/Irakli Gedenidze

Georgian service members take part in a ceremony closing the Noble Partner 2020 multinational military exercises conducted by Georgian, British, French, Polish and U.S. troops at Vaziani firing ground outside Tbilisi, Georgia September 18, 2020. REUTERS/Irakli Gedenidze

U.S. service members take part in a ceremony closing the Noble Partner 2020 multinational military exercises conducted by Georgian, British, French, Polish and U.S. troops at Vaziani firing ground outside Tbilisi, Georgia September 18, 2020. REUTERS/Irakli Gedenidze