Fireworks are seen during an international fireworks show in Vilnius, Lithuania, Sept. 21, 2019. Teams from the United States, Portugal, the Czech Republic and Lithuania took part in the show. (Photo: Alfredas Pliadis/Xinhua)

Fireworks are seen during an international fireworks show in Vilnius, Lithuania, Sept. 21, 2019. Teams from the United States, Portugal, the Czech Republic and Lithuania took part in the show. (Photo: Alfredas Pliadis/Xinhua)

Fireworks are seen during an international fireworks show in Vilnius, Lithuania, Sept. 21, 2019. Teams from the United States, Portugal, the Czech Republic and Lithuania took part in the show. (Photo: Alfredas Pliadis/Xinhua)

Fireworks are seen during an international fireworks show in Vilnius, Lithuania, Sept. 21, 2019. Teams from the United States, Portugal, the Czech Republic and Lithuania took part in the show. (Photo: Alfredas Pliadis/Xinhua)

Fireworks are seen during an international fireworks show in Vilnius, Lithuania, Sept. 21, 2019. Teams from the United States, Portugal, the Czech Republic and Lithuania took part in the show. (Photo: Alfredas Pliadis/Xinhua)

Fireworks are seen during an international fireworks show in Vilnius, Lithuania, Sept. 21, 2019. Teams from the United States, Portugal, the Czech Republic and Lithuania took part in the show. (Photo: Alfredas Pliadis/Xinhua)

Fireworks are seen during an international fireworks show in Vilnius, Lithuania, Sept. 21, 2019. Teams from the United States, Portugal, the Czech Republic and Lithuania took part in the show. (Photo: Alfredas Pliadis/Xinhua)

Fireworks are seen during an international fireworks show in Vilnius, Lithuania, Sept. 21, 2019. Teams from the United States, Portugal, the Czech Republic and Lithuania took part in the show. (Photo: Alfredas Pliadis/Xinhua)

Fireworks are seen during an international fireworks show in Vilnius, Lithuania, Sept. 21, 2019. Teams from the United States, Portugal, the Czech Republic and Lithuania took part in the show. (Photo: Alfredas Pliadis/Xinhua)

Fireworks are seen during an international fireworks show in Vilnius, Lithuania, Sept. 21, 2019. Teams from the United States, Portugal, the Czech Republic and Lithuania took part in the show. (Photo: Alfredas Pliadis/Xinhua)