Beijing confirms strict 'closed loop' for Winter Olympics
Supporters of the 2022 Beijing Winter Olympics cheer as they mark the start of the 100 days countdown to the opening of the Winter Olympics in Beijing, China, Tuesday, Oct. 26, 2021. (AP Photo/Ng Han Guan)

Supporters of the 2022 Beijing Winter Olympics cheer as they mark the start of the 100 days countdown to the opening of the Winter Olympics in Beijing, China, Tuesday, Oct. 26, 2021. (AP Photo/Ng Han Guan)

Oct. 26, 2021 08:36 AM EDT
A supporter of the 2022 Beijing Winter Olympics poses for photos with a countdown clock as it crosses into the 100 days countdown to the opening of the Winter Olympics in Beijing, China, Tuesday, Oct. 26, 2021. (AP Photo/Ng Han Guan) ///

A supporter of the 2022 Beijing Winter Olympics poses for photos with a countdown clock as it crosses into the 100 days countdown to the opening of the Winter Olympics in Beijing, China, Tuesday, Oct. 26, 2021. (AP Photo/Ng Han Guan) ///

Oct. 26, 2021 09:27 AM EDT
Maxim Andrianov, Aleksei Pushkarev, Vasiliy Kondratenko, and Vladislav Zharovtsev of Russia compete in the four-man bobsleigh during an IBSF Sanctioned Race, a test event for the 2022 Winter Olympics, at the Yanqing National Sliding Center in Beijing, Tuesday, Oct. 26, 2021. (AP Photo/Mark Schiefelbein)

Maxim Andrianov, Aleksei Pushkarev, Vasiliy Kondratenko, and Vladislav Zharovtsev of Russia compete in the four-man bobsleigh during an IBSF Sanctioned Race, a test event for the 2022 Winter Olympics, at the Yanqing National Sliding Center in Beijing, Tuesday, Oct. 26, 2021. (AP Photo/Mark Schiefelbein)

Oct. 26, 2021 04:29 AM EDT
A supporter makes a gesture with her hands near a countdown clock as it crosses into the 100 days countdown to the opening of the Winter Olympics in Beijing, China, Tuesday, Oct. 26, 2021. (AP Photo/Ng Han Guan)

A supporter makes a gesture with her hands near a countdown clock as it crosses into the 100 days countdown to the opening of the Winter Olympics in Beijing, China, Tuesday, Oct. 26, 2021. (AP Photo/Ng Han Guan)

Oct. 26, 2021 08:53 AM EDT
Francesco Friedrich, Thorsten Margis, Candy Bauer, and Alexander Schueller of Germany compete in the four-man bobsleigh during an IBSF Sanctioned Race, a test event for the 2022 Winter Olympics, at the Yanqing National Sliding Center in Beijing, Tuesday, Oct. 26, 2021. (AP Photo/Mark Schiefelbein)

Francesco Friedrich, Thorsten Margis, Candy Bauer, and Alexander Schueller of Germany compete in the four-man bobsleigh during an IBSF Sanctioned Race, a test event for the 2022 Winter Olympics, at the Yanqing National Sliding Center in Beijing, Tuesday, Oct. 26, 2021. (AP Photo/Mark Schiefelbein)

Oct. 26, 2021 04:27 AM EDT