U.S. President Joe Biden tests the new Ford F-150 lightning truck as he visits VDAB at Ford Dearborn Development Center in Dearborn, Michigan, U.S., May 18, 2021. REUTERS/Leah Millis

U.S. President Joe Biden tests the new Ford F-150 lightning truck as as he visits VDAB at Ford Dearborn Development Center in Dearborn, Michigan, U.S., May 18, 2021. REUTERS/Leah Millis

U.S. President Joe Biden tests the new Ford F-150 lightning truck as he visits VDAB at Ford Dearborn Development Center in Dearborn, Michigan, U.S., May 18, 2021. REUTERS/Leah Millis

U.S. President Joe Biden waves as he tests the new Ford F-150 lightning truck as he visits VDAB at Ford Dearborn Development Center in Dearborn, Michigan, U.S., May 18, 2021. REUTERS/Leah Millis

U.S. President Joe Biden tests the new Ford F-150 lightning truck as he visits VDAB at Ford Dearborn Development Center in Dearborn, Michigan, U.S., May 18, 2021. REUTERS/Leah Millis

U.S. President Joe Biden test the new Ford F-150 lightning truck as as he visits VDAB at Ford Dearborn Development Center in Dearborn, Michigan, U.S., May 18, 2021. REUTERS/Leah Millis

Coronavirus disease (COVID-19) rapid test devices are seen as visitors of the "Emilia senior residence" elderly care are tested, in Darmstadt, Germany, May 18, 2021. REUTERS/Kai Pfaffenbach

A visitors of the "Emilia senior residence" elderly care gets tested as the spread of the coronavirus disease (COVID-19) continues, in Darmstadt, Germany, May 18, 2021. REUTERS/Kai Pfaffenbach

Visitors of the "Emilia senior residence" elderly care are tested as the spread of the coronavirus disease (COVID-19) continues, in Darmstadt, Germany, May 18, 2021. REUTERS/Kai Pfaffenbach

A sign is seen at a testing centre amid the outbreak of the coronavirus disease (COVID-19), in the Shoreditch area of London, Britain, 18 May 2021. REUTERS/Hannah McKay

A sign is seen at a testing centre amid the outbreak of the coronavirus disease (COVID-19), in the Shoreditch area of London, Britain, 18 May 2021. REUTERS/Hannah McKay

A person walks past a testing centre amid the outbreak of the coronavirus disease (COVID-19), in the Shoreditch area of London, Britain, 18 May 2021. REUTERS/Hannah McKay

A person walks past a testing centre amid the outbreak of the coronavirus disease (COVID-19), in the Shoreditch area of London, Britain, 18 May 2021. REUTERS/Hannah McKay

Tokyo 2020 Olympics Test Event - Shooting - Shigetaka Oyama in action during the trap event at the Tokyo 2020 Olympics Shooting test event at Asaka Shooting Range in Tokyo, Japan May 18, 2021. REUTERS/Kim Kyung-Hoon

Tokyo 2020 Olympics Test Event - Shooting - Shigetaka Oyama in action during the trap event at the Tokyo 2020 Olympics Shooting test event at Asaka Shooting Range in Tokyo, Japan May 18, 2021. REUTERS/Kim Kyung-Hoon

Tokyo 2020 Olympics Test Event - Shooting - Megumi Inoue in action during the trap event at the Tokyo 2020 Olympics Shooting test event at Asaka Shooting Range in Tokyo, Japan May 18, 2021. REUTERS/Kim Kyung-Hoon

Tokyo 2020 Olympics Test Event - Shooting - Naoya Okada during the 10m air rifle mixed team event at the Tokyo 2020 Olympics Shooting test event at Asaka Shooting Range in Tokyo, Japan May 18, 2021. REUTERS/Kim Kyung-Hoon

Tokyo 2020 Olympics Test Event - Shooting - Ayano Shimizu during the 10m air rifle mixed team event at the Tokyo 2020 Olympics Shooting test event at Asaka Shooting Range in Tokyo, Japan May 18, 2021. REUTERS/Kim Kyung-Hoon

Tokyo 2020 Olympics Test Event - Shooting - Shiori Hirata during the 10m air rifle mixed team event at the Tokyo 2020 Olympics Shooting test event at Asaka Shooting Range in Tokyo, Japan May 18, 2021. REUTERS/Kim Kyung-Hoon

Tokyo 2020 Olympics Test Event - Shooting - Shiori Hirata in action during the 10m air rifle mixed team event at the Tokyo 2020 Olympics Shooting test event at Asaka Shooting Range in Tokyo, Japan May 18, 2021. REUTERS/Kim Kyung-Hoon

Tokyo 2020 Olympics Test Event - Shooting - Haruka Nakaguchi and Naoya Okada in action during the 10m air rifle mixed team event at the Tokyo 2020 Olympics Shooting test event at Asaka Shooting Range in Tokyo, Japan May 18, 2021. REUTERS/Kim Kyung-Hoon

Tokyo 2020 Olympics Test Event - Shooting - Takayuki Matsumoto in action during the 10m air rifle mixed team event at the Tokyo 2020 Olympics Shooting test event at Asaka Shooting Range in Tokyo, Japan May 18, 2021. REUTERS/Kim Kyung-Hoon

Tokyo 2020 Olympics Test Event - Shooting - Athletes take part during the 10m air rifle mixed team event at the Tokyo 2020 Olympics Shooting test event at Asaka Shooting Range in Tokyo, Japan May 18, 2021. REUTERS/Kim Kyung-Hoon

Tokyo 2020 Olympics Test Event - Shooting - Naoko Ishihara in action during the shotgun skeet event at the Tokyo 2020 Olympics Shooting test event at Asaka Shooting Range in Tokyo, Japan May 18, 2021. REUTERS/Kim Kyung-Hoon

Tokyo 2020 Olympics Test Event - Shooting - Naoko Ishihara in action during the shotgun skeet event at the Tokyo 2020 Olympics Shooting test event at Asaka Shooting Range in Tokyo, Japan May 18, 2021. REUTERS/Kim Kyung-Hoon

Tokyo 2020 Olympics Test Event - Shooting - Naoko Ishihara in action during the shotgun skeet event at the Tokyo 2020 Olympics Shooting test event at Asaka Shooting Range in Tokyo, Japan May 18, 2021. REUTERS/Kim Kyung-Hoon QUALITY REPEAT

Tokyo 2020 Olympics Test Event - Shooting - Hiroyuki Ikawa in action during the shotgun skeet event at the Tokyo 2020 Olympics Shooting test event at Asaka Shooting Range in Tokyo, Japan May 18, 2021. REUTERS/Kim Kyung-Hoon

Tokyo 2020 Olympics Test Event - Shooting - Hiroyuki Ikawa in action during the shotgun skeet event at the Tokyo 2020 Olympics Shooting test event at Asaka Shooting Range in Tokyo, Japan May 18, 2021. REUTERS/Kim Kyung-Hoon

Tokyo 2020 Olympics Test Event - Shooting - Hiroyuki Ikawa in action during the shotgun skeet event at the Tokyo 2020 Olympics Shooting test event at Asaka Shooting Range in Tokyo, Japan May 18, 2021. REUTERS/Kim Kyung-Hoon

Tokyo 2020 Olympics Test Event - Shooting - Naoko Ishihara in action during the shotgun skeet event at the Tokyo 2020 Olympics Shooting test event at Asaka Shooting Range in Tokyo, Japan May 18, 2021. REUTERS/Kim Kyung-Hoon

Tokyo 2020 Olympics Test Event - Shooting - A venue official looks on at the shotgun range during the men and women's shotgun skeet event at the Tokyo 2020 Olympics Shooting test event at Asaka Shooting Range in Tokyo, Japan May 18, 2021. REUTERS/Kim Kyung-Hoon

Tokyo 2020 Olympics Test Event - Shooting - Japan's Chizuru Sasaki in action during the 10m air pistol mixed team event at the Tokyo 2020 Olympics Shooting test event at Asaka Shooting Range in Tokyo, Japan May 18, 2021. REUTERS/Kim Kyung-Hoon

Tokyo 2020 Olympics Test Event - Shooting - Japan's Akiko Sato in action during the 10m air pistol mixed team event at the Tokyo 2020 Olympics Shooting test event at Asaka Shooting Range in Tokyo, Japan May 18, 2021. REUTERS/Kim Kyung-Hoon

Tokyo 2020 Olympics Test Event - Shooting - Japan's Satako Yamada in action during the 10m air pistol mixed team event at the Tokyo 2020 Olympics Shooting test event at Asaka Shooting Range in Tokyo, Japan May 18, 2021. REUTERS/Kim Kyung-Hoon

Tokyo 2020 Olympics Test Event - Shooting - Japan's Seiji Morikawa in action during the 10m air pistol mixed team event at the Tokyo 2020 Olympics Shooting test event at Asaka Shooting Range in Tokyo, Japan May 18, 2021. REUTERS/Kim Kyung-Hoon

Tokyo 2020 Olympics Test Event - Shooting - Players in action during the 10m air pistol mixed team event at the Tokyo 2020 Olympics Shooting test event at Asaka Shooting Range in Tokyo, Japan May 18, 2021. REUTERS/Kim Kyung-Hoon

Tokyo 2020 Olympics Test Event - Shooting - Venue officials check the targets during the 10m air pistol mixed team event at the Tokyo 2020 Olympics Shooting test event at Asaka Shooting Range in Tokyo, Japan May 18, 2021. REUTERS/Kim Kyung-Hoon

Tokyo 2020 Olympics Test Event - Shooting - Venue officials check the targets during the 10m air pistol mixed team event at the Tokyo 2020 Olympics Shooting test event at Asaka Shooting Range in Tokyo, Japan May 18, 2021. REUTERS/Kim Kyung-Hoon

Tokyo 2020 Olympics Test Event - Shooting - Japan's Yamada Satoko and Seiji Morikawa in action during the 10m air pistol mixed team event at the Tokyo 2020 Olympics Shooting test event at Asaka Shooting Range in Tokyo, Japan May 18, 2021. REUTERS/Kim Kyung-Hoon

Tokyo 2020 Olympics Test Event - Shooting - The Japanese flag is seen on Japan's Yamada Satoko's earplugs during the 10m air pistol mixed team event at the Tokyo 2020 Olympics Shooting test event at Asaka Shooting Range in Tokyo, Japan May 18, 2021. REUTERS/Kim Kyung-Hoon REFILE - CLARIFYING TITLE OF EVENT

Tokyo 2020 Olympics Test Event - Shooting - Yuki Takahashi looks on during the 10m air pistol mixed team event at the Tokyo 2020 Olympics Shooting test event at Asaka Shooting Range in Tokyo, Japan May 18, 2021. REUTERS/Kim Kyung-Hoon REFILE - CLARIFYING TITLE OF EVENT

A woman walks along a street next to a sign directing people to a testing centre amid the outbreak of the coronavirus disease (COVID-19) in the Shoreditch area of London, Britain, May 17, 2021. REUTERS/John Sibley

A sign directing people to a testing centre is pictured amid the outbreak of the coronavirus disease (COVID-19) in the Shoreditch area of London, Britain, May 17, 2021. REUTERS/John Sibley

A man wearing a protective mask walks past a testing centre amid the outbreak of the coronavirus disease (COVID-19) in the Shoreditch area of London, Britain, May 17, 2021. REUTERS/John Sibley

A healthworker registers a boy who has tested positive for the coronavirus disease (COVID-19) before he is sent to a hospital, in Bangkok, Thailand May 17, 2021. REUTERS/Soe Zeya Tun

A man who has tested positive for the coronavirus disease (COVID-19) sits in a bus as he is sent to a hospital, in Bangkok, Thailand May 17, 2021. REUTERS/Soe Zeya Tun

A woman who has tested positive for the coronavirus disease (COVID-19) walks towards a bus as she is sent to a hospital, in Bangkok, Thailand May 17, 2021. REUTERS/Soe Zeya Tun

A woman who has tested positive for the coronavirus disease (COVID-19) walks towards a bus as she is sent to a hospital, in Bangkok, Thailand May 17, 2021. REUTERS/Soe Zeya Tun

A woman's face is reflected in a mirror as people who have tested positive for the coronavirus disease (COVID-19) wait for paperwork to be processed by authorities before they are sent to a hospital, in Bangkok, Thailand May 17, 2021. REUTERS/Soe Zeya Tun

A man stands outside his apartment as people who have tested positive for the coronavirus disease (COVID-19) wait for paperwork to be processed by authorities before they are sent to a hospital, in Bangkok, Thailand May 17, 2021. REUTERS/Soe Zeya Tun

A man walks past a sign directing people to a testing station, amid the outbreak of the coronavirus disease (COVID-19) in Bolton, Britain, May 17, 2021. REUTERS/Phil Noble

A sign directs people to a testing station amid the outbreak of the coronavirus disease (COVID-19) in Bolton, Britain, May 17, 2021. REUTERS/Phil Noble

A pupil of the Karlschule primary school does a 'Lolly' COVID-19 test as the school re-opens for classroom teaching, amid the coronavirus disease (COVID-19) pandemic, in Bonn, Germany, May 17, 2021. REUTERS/Thilo Schmuelgen

Teacher Vieira da Silva collects 'Lolly' COVID-19 tests from pupils of the Karlschule primary school as the school re-opens for classroom teaching, amid the coronavirus disease (COVID-19) pandemic, in Bonn, Germany, May 17, 2021. REUTERS/Thilo Schmuelgen

A teacher presents 'Lolly' COVID-19 tests from pupils of the Karlschule primary school as the school re-opens for classroom teaching, amid the coronavirus disease (COVID-19) pandemic, in Bonn, Germany, May 17, 2021. REUTERS/Thilo Schmuelgen

Teacher Vieira da Silva explains to pupils of the Karlschule primary school how to use 'Lolly' COVID-19 tests as the school re-opens for classroom teaching, amid the coronavirus disease (COVID-19) pandemic, in Bonn, Germany, May 17, 2021. REUTERS/Thilo Schmuelgen

Teacher Vieira da Silva collects 'Lolly' COVID-19 tests from pupils of the Karlschule primary school as the school re-opens for classroom teaching, amid the coronavirus disease (COVID-19) pandemic, in Bonn, Germany, May 17, 2021. REUTERS/Thilo Schmuelgen

Teacher Vieira da Silva collects 'Lolly' COVID-19 tests from pupils of the Karlschule primary school as the school re-opens for classroom teaching, amid the coronavirus disease (COVID-19) pandemic, in Bonn, Germany, May 17, 2021. REUTERS/Thilo Schmuelgen

Teacher Vieira da Silva collects 'Lolly' COVID-19 tests from pupils of the Karlschule primary school as the school re-opens for classroom teaching, amid the coronavirus disease (COVID-19) pandemic, in Bonn, Germany, May 17, 2021. REUTERS/Thilo Schmuelgen

A pupil of the Karlschule primary school does a 'Lolly' COVID-19 test as the school re-opens for classroom teaching, amid the coronavirus disease (COVID-19) pandemic, in Bonn, Germany, May 17, 2021. REUTERS/Thilo Schmuelgen