A participant of a half-marathon race is sprayed with water during hot weather in Omsk, Russia May 30, 2021. REUTERS/Alexey Malgavko TPX IMAGES OF THE DAY

Tesfay Felfele of Eritrea and Refugee Olympic Team hopeful for the marathon at the Olympics Games in Tokyo poses before a training session in Onex, Switzerland, May 25, 2021. Picture taken May 25, 2021. REUTERS/Denis Balibouse

Tesfay Felfele of Eritrea and Refugee Olympic Team hopeful for the marathon at the Olympics Games in Tokyo runs during a training session in Onex, Switzerland, May 25, 2021. Picture taken May 25, 2021. REUTERS/Denis Balibouse

Tesfay Felfele of Eritrea and Refugee Olympic Team hopeful for the marathon at the Olympics Games in Tokyo warms up before a training session in Onex, Switzerland, May 25, 2021. Picture taken May 25, 2021. REUTERS/Denis Balibouse

Tesfay Felfele of Eritrea and Refugee Olympic Team hopeful for the marathon at the Olympics Games in Tokyo runs during a training session in Onex, Switzerland, May 25, 2021. Picture taken May 25, 2021. REUTERS/Denis Balibouse

Plastic bags covering fuel pumps to signal no gas is available is seen at a Marathon gas station after a cyberattack crippled the biggest fuel pipeline in the country, run by Colonial Pipeline, in Lakeland, Florida, U.S. May 14, 2021. REUTERS/Octavio Jones

Plastic bags covering fuel pumps to signal no gas is available is seen at a Marathon gas station after a cyberattack crippled the biggest fuel pipeline in the country, run by Colonial Pipeline, in Lakeland, Florida, U.S. May 14, 2021. REUTERS/Octavio Jones

Kyle Roberts fills up his gas tank at the Marathon gas station, after a cyberattack crippled the biggest fuel pipeline in the country, run by Colonial Pipeline, in Tampa, Florida, U.S., May 12, 2021. REUTERS/Octavio Jones

Kyle Roberts fills up his gas tank at the Marathon gas station, after a cyberattack crippled the biggest fuel pipeline in the country, run by Colonial Pipeline, in Tampa, Florida, U.S., May 12, 2021. REUTERS/Octavio Jones

Shohei Otsuka of Japan reacts after he crossed the finish line at the men's half-marathon of the Hokkaido-Sapporo Marathon Festival 2021, a testing event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak, in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato/Pool

Ayuko Suzuki of Japan reacts after she crossed the finish line at the women's half-marathon of the Hokkaido-Sapporo Marathon Festival 2021, a testing event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak, in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato/Pool

Simon Kariuki of Kenya reacts after he crossed the finish line at the men's half-marathon of the Hokkaido-Sapporo Marathon Festival 2021, a testing event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak, in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato/Pool

Prabudass Krishnan of Malaysia reacts after he crossed the finish line at the men's half-marathon of the Hokkaido-Sapporo Marathon Festival 2021, a testing event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato/Pool

Mao Ichiyama of Japan reacts after she crossed the finish line at the women's half-marathon of the Hokkaido-Sapporo Marathon Festival 2021, a testing event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak, in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato/Pool

Yuma Hattori of Japan reacts after he crossed the finish line at the men's half-marathon of the Hokkaido-Sapporo Marathon Festival 2021, a testing event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato/Pool

Bart van Nunen of Netherlands reacts after he crossed the finish line at the men's half-marathon of the Hokkaido-Sapporo Marathon Festival 2021, a testing event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato/Pool

World Athletics President Sebastian Coe attends a news conference after the Hokkaido-Sapporo Marathon Festival 2021, a testing event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato/Pool

World Athletics President Sebastian Coe attends a news conference after the Hokkaido-Sapporo Marathon Festival 2021, a testing event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato/Pool

World Athletics President Sebastian Coe attends a news conference after the Hokkaido-Sapporo Marathon Festival 2021, a testing event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato/Pool

Tokyo 2020 Games Operations Bureau Deputy Executive Director Yasuo Mori attends a news conference after the Hokkaido-Sapporo Marathon Festival 2021, a testing event for the Tokyo 2020 Olympics marathon race, amid the coronavirurus disease (COVID-19) outbreak, in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato/Pool

A small number of spectators are seen near the finish point at the half-marathon of the Hokkaido-Sapporo Marathon Festival 2021, a testing event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato/Pool

Officials wearing protective face masks and shields are seen at the finish point of the half-marathon of the Hokkaido-Sapporo Marathon Festival 2021, a testing event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato/Pool

President of the Tokyo 2020 Organising Committee (Tokyo 2020) Seiko Hashimoto inspects the half-marathon of the Hokkaido-Sapporo Marathon Festival 2021, a testing event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato/Pool

Runners cross the finish line while small groups of spectators are seen during the half-marathon of the Hokkaido-Sapporo Marathon Festival 2021, a testing event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato/Pool

Runners take part in the half-marathon without spectators during the Hokkaido-Sapporo Marathon Festival 2021, a testing event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak, in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato

Runners take part in the 10km marathon, without spectators, during the Hokkaido-Sapporo Marathon Festival 2021, a testing event for the Tokyo 2020 Olympics marathon race, amid the coronavirurus disease (COVID-19) outbreak in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato

Runners take part in the 10km marathon without spectators during the Hokkaido-Sapporo Marathon Festival 2021, a testing event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak, in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato

World Athletics President Sebastian Coe (R), wearing a protective face mask, inspects the half-marathon of the Hokkaido-Sapporo Marathon Festival 2021, a testing event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak, in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato/Pool

4th-place runner Katharina Steinruck of Germany crosses the finish line at the women's half-marathon of the Hokkaido-Sapporo Marathon Festival 2021, a testing event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak, in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato/Pool

World Athletics President Sebastian Coe, wearing a protective face mask, inspects the half-marathon of the Hokkaido-Sapporo Marathon Festival 2021, a testing event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak, in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato/Pool

4th-place runner Katharina Steinruck of Germany crosses the finish line at the women's half-marathon of the Hokkaido-Sapporo Marathon Festival 2021, a testing event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak, in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato/Pool

4th-place runner Katharina Steinruck of Germany crosses the finish line at the women's half-marathon of the Hokkaido-Sapporo Marathon Festival 2021, a testing event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak, in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato/Pool

Winner Mao Ichiyama of Japan leads her compatriot Mizuki Matsuda as she crosses the finish line at the women's half-marathon of the Hokkaido-Sapporo Marathon Festival 2021, a testing event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak, in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato/Pool

Winner Hillary Kipkoech of Kenya crosses the finish line at the men's half-marathon of the Hokkaido-Sapporo Marathon Festival 2021, a testing event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak, in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato/Pool

Winner Hillary Kipkoech of Kenya crosses the finish line at the men's half-marathon of the Hokkaido-Sapporo Marathon Festival 2021, a testing event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak, in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato/Pool

Winner Mao Ichiyama of Japan crosses the finish line at the women's half-marathon of the Hokkaido-Sapporo Marathon Festival 2021, a testing event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak, in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato/Pool

Winner Hillary Kipkoech of Kenya crosses the finish line at the men's half-marathon of the Hokkaido-Sapporo Marathon Festival 2021, a testing event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak, in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato/Pool

Athletes compete at the half-marathon race which doubles as a test event for the 2020 Tokyo Olympics, in Sapporo, Japan May 5, 2021. Charly Triballeau/Pool via REUTERS

Athletes compete at the half-marathon race which doubles as a test event for the 2020 Tokyo Olympics, in Sapporo, Japan May 5, 2021.Charly Triballeau/Pool via REUTERS

Athletes compete at the half-marathon race which doubles as a test event for the 2020 Tokyo Olympics, in Sapporo, Japan May 5, 2021.Charly Triballeau/Pool via REUTERS

Athletes compete at the half-marathon race which doubles as a test event for the 2020 Tokyo Olympics, in Sapporo, Japan May 5, 2021.Charly Triballeau/Pool via REUTERS

Athletes compete at the half-marathon race which doubles as a test event for the 2020 Tokyo Olympics, in Sapporo, Japan May 5, 2021.Charly Triballeau/Pool via REUTERS

Athletes compete at the half-marathon race which doubles as a test event for the 2020 Tokyo Olympics, in Sapporo, Japan May 5, 2021. Charly Triballeau/Pool via REUTERS

Athletes compete at the half-marathon race which doubles as a test event for the 2020 Tokyo Olympics, in Sapporo, Japan May 5, 2021. Charly Triballeau/Pool via REUTERS

Athletes compete at the half-marathon race which doubles as a test event for the 2020 Tokyo Olympics, in Sapporo, Japan May 5, 2021. Charly Triballeau/Pool via REUTERS

Athletes compete at the half-marathon race which doubles as a test event for the 2020 Tokyo Olympics, in Sapporo, Japan May 5, 2021. Charly Triballeau/Pool via REUTERS

Athletes compete at the half-marathon race which doubles as a test event for the 2020 Tokyo Olympics, in Sapporo, Japan May 5, 2021. Charly Triballeau/Pool via REUTERS

Runners take part in the 10K race of the Hokkaido-Sapporo Marathon Festival 2021, which is a test event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak, in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato

Runners take part in the Hokkaido-Sapporo Marathon Festival 2021, a half-marathon and a 10K race which is a test event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak, in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato

Runners take part in the Hokkaido-Sapporo Marathon Festival 2021, a half-marathon and a 10K race which is a test event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak, in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato

Runners take part in the Hokkaido-Sapporo Marathon Festival 2021, a half-marathon and a 10K race which is a test event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak, in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato

Runners take part in the Hokkaido-Sapporo Marathon Festival 2021, a half-marathon and a 10K race which is a test event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak, in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato

Runners take part in the Hokkaido-Sapporo Marathon Festival 2021, a half-marathon and a 10K race which is a test event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak, in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato

A member of the security personnel wears a sign that reads "In order to prevent infection, please refrain from watching," along the route of the Hokkaido-Sapporo Marathon Festival 2021, a half-marathon and a 10K race which is a test event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak, in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato

Runners warm up before the start of the Hokkaido-Sapporo Marathon Festival 2021, a half-marathon and a 10K race which is a test event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak, in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato

Runners warm up before the start of the Hokkaido-Sapporo Marathon Festival 2021, a half-marathon and a 10K race which is a test event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak, in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato

Runners warm up before the start of the Hokkaido-Sapporo Marathon Festival 2021, a half-marathon and a 10K race which is a test event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak, in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato

Runners warm up before the start of the Hokkaido-Sapporo Marathon Festival 2021, a half-marathon and a 10K race which is a test event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak, in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato

A firefighter holds a sign that reads "In order to prevent infection, please refrain from watching," along the route before the start of the Hokkaido-Sapporo Marathon Festival 2021, a half-marathon and a 10K race which is a test event for the Tokyo 2020 Olympics marathon race, amid the coronavirus disease (COVID-19) outbreak, in Sapporo, Hokkaido, Japan May 5, 2021. REUTERS/Issei Kato

The Oxitec logo is seen on a box used for GMO mosquitos release at the Florida Keys Mosquito Control District headquarters, in Marathon, Florida, U.S. May 4, 2021. Picture taken May 4, 2021. REUTERS/Marco Bello