Military airplane and vehicles are displayed at the museum of open-air installations on the Red Square in Moscow, Russia, on Nov. 7, 2020. The parade celebrating the 79th anniversary of the military parade in 1941 was canceled this year because of restrictions to stop the spread of COVID-19. (Photos: Xinhua)

World War II military vehicles are displayed at the museum of open-air installations on the Red Square in Moscow, Russia, on Nov. 7, 2020. The parade celebrating the 79th anniversary of the military parade in 1941 was canceled this year because of restrictions to stop the spread of COVID-19.

Children play on the World War II-era gun at the museum of open-air installations on the Red Square in Moscow, Russia, on Nov. 7, 2020. The parade celebrating the 79th anniversary of the military parade in 1941 was canceled this year because of restrictions to stop the spread of COVID-19.

World War II military vehicles are displayed at the museum of open-air installations on the Red Square in Moscow, Russia, on Nov. 7, 2020. The parade celebrating the 79th anniversary of the military parade in 1941 was canceled this year because of restrictions to stop the spread of COVID-19.

People visit the museum of open-air installations on the Red Square in Moscow, Russia, on Nov. 7, 2020. The parade celebrating the 79th anniversary of the military parade in 1941 was canceled this year because of restrictions to stop the spread of COVID-19.

Volunteers dressed in World War II-era uniforms work at an open-air museum of installations on the Red Square in Moscow, Russia, on Nov. 7, 2020. The parade celebrating the 79th anniversary of the military parade in 1941 was canceled this year because of restrictions to stop the spread of COVID-19.

Children play on the World War II-era gun at the museum of open-air installations on the Red Square in Moscow, Russia, on Nov. 7, 2020. The parade celebrating the 79th anniversary of the military parade in 1941 was canceled this year because of restrictions to stop the spread of COVID-19.