People wearing protective masks attend a concert of "Love of Lesbian" at the Palau Sant Jordi, the first massive concert since the beginning of the coronavirus disease (COVID-19) pandemic in Barcelona, Spain, March 27, 2021. REUTERS/Albert Gea

People wearing protective masks attend a concert of "Love of Lesbian" at the Palau Sant Jordi, the first massive concert since the beginning of the coronavirus disease (COVID-19) pandemic in Barcelona, Spain, March 27, 2021. REUTERS/Albert Gea

People wearing protective masks attend a concert of "Love of Lesbian" at the Palau Sant Jordi, the first massive concert since the beginning of the coronavirus disease (COVID-19) pandemic in Barcelona, Spain, March 27, 2021. REUTERS/Albert Gea

People wearing protective masks attend a concert of "Love of Lesbian" at the Palau Sant Jordi, the first massive concert since the beginning of the coronavirus disease (COVID-19) pandemic in Barcelona, Spain, March 27, 2021. REUTERS/Albert Gea

People wearing protective masks attend a concert of "Love of Lesbian" at the Palau Sant Jordi, the first massive concert since the beginning of the coronavirus disease (COVID-19) pandemic in Barcelona, Spain, March 27, 2021. REUTERS/Albert Gea

The "Love of Lesbian" performs at the Palau Sant Jordi during the first massive concert since the beginning of the coronavirus disease (COVID-19) pandemic in Barcelona, Spain, March 27, 2021. REUTERS/ Albert Gea

People wearing protective masks attend a concert of "Love of Lesbian" at the Palau Sant Jordi, the first massive concert since the beginning of the coronavirus disease (COVID-19) pandemic in Barcelona, Spain, March 27, 2021. REUTERS/Albert Gea

People wearing protective masks attend a concert of "Love of Lesbian" at the Palau Sant Jordi, the first massive concert since the beginning of the coronavirus disease (COVID-19) pandemic in Barcelona, Spain, March 27, 2021. REUTERS/Albert Gea

People wearing protective masks attend a concert of "Love of Lesbian" at the Palau Sant Jordi, the first massive concert since the beginning of the coronavirus disease (COVID-19) pandemic in Barcelona, Spain, March 27, 2021. REUTERS/Albert Gea

People wearing protective masks attend a concert of "Love of Lesbian" at the Palau Sant Jordi, the first massive concert since the beginning of the coronavirus disease (COVID-19) pandemic in Barcelona, Spain, March 27, 2021. REUTERS/Albert Gea TPX IMAGES OF THE DAY

A couple wearing protective masks attends a concert of "Love of Lesbian" at the Palau Sant Jordi, the first massive concert since the beginning of the coronavirus disease (COVID-19) pandemic in Barcelona, Spain, March 27, 2021. REUTERS/Albert Gea

The "Love of Lesbian" performs at the Palau Sant Jordi during the first massive concert since the beginning of the coronavirus disease (COVID-19) pandemic in Barcelona, Spain, March 27, 2021. REUTERS/ Albert Gea

Spectators wearing protective masks attend a concert of "Love of Lesbian" at the Palau Sant Jordi, the first massive concert since the beginning of the coronavirus disease (COVID-19) pandemic in Barcelona, Spain, March 27, 2021. REUTERS/ Albert Gea

Spectators wearing protective masks wait before a concert of "Love of Lesbian" at the Palau Sant Jordi, the first massive concert since the beginning of the coronavirus disease (COVID-19) pandemic in Barcelona, Spain, March 27, 2021. REUTERS/ Albert Gea

A couple wearing protective masks takes a selfie before a concert of "Love of Lesbian" at the Palau Sant Jordi, the first massive concert since the beginning of the coronavirus disease (COVID-19) pandemic in Barcelona, Spain, March 27, 2021. REUTERS/Albert Gea

Spectators wearing face masks wait before a concert of "Love of Lesbian" at the Palau Sant Jordi, the first massive concert since the beginning of the coronavirus disease (COVID-19) pandemic in Barcelona, Spain, March 27, 2021. REUTERS/ Albert Gea

Spectators wearing face masks wait before a concert of "Love of Lesbian" at the Palau Sant Jordi, the first massive concert since the beginning of the coronavirus disease (COVID-19) pandemic in Barcelona, Spain, March 27, 2021. REUTERS/ Albert Gea

Healthcare workers prepare to collect swab samples from people, before a concert of "Love of Lesbian" that will take place this afternoon with 5,000 spectators at the Palau Sant Jordi, amid the coronavirus disease (COVID-19) pandemic, in Barcelona, Spain, March 27, 2021. REUTERS/ Albert Gea

Healthcare workers prepare to collect swab samples from people, before a concert of "Love of Lesbian" that will take place this afternoon with 5,000 spectators at the Palau Sant Jordi, amid the coronavirus disease (COVID-19) pandemic, in Barcelona, Spain, March 27, 2021. REUTERS/ Albert Gea

A healthcare worker prepares samples, before a concert of "Love of Lesbian" that will take place this afternoon with 5,000 spectators at the Palau Sant Jordi, amid the coronavirus disease (COVID-19) pandemic, in Barcelona, Spain, March 27, 2021. REUTERS/ Albert Gea

Healthcare workers collect swab samples from people, before a concert of "Love of Lesbian" that will take place this afternoon with 5,000 spectators at the Palau Sant Jordi, amid the coronavirus disease (COVID-19) pandemic, in Barcelona, Spain, March 27, 2021. REUTERS/ Albert Gea

A healthcare worker collects a swab sample from a woman, before a concert of "Love of Lesbian" that will take place this afternoon with 5,000 spectators at the Palau Sant Jordi, amid the coronavirus disease (COVID-19) pandemic, in Barcelona, Spain, March 27, 2021. REUTERS/ Albert Gea

A healthcare worker collects a swab sample from a person, before a concert of "Love of Lesbian" that will take place this afternoon with 5,000 spectators at the Palau Sant Jordi, amid the coronavirus disease (COVID-19) pandemic, in Barcelona, Spain, March 27, 2021. REUTERS/ Albert Gea

Healthcare workers prepare to collect swab samples from people, before a concert of "Love of Lesbian" that will take place this afternoon with 5,000 spectators at the Palau Sant Jordi, amid the coronavirus disease (COVID-19) pandemic, in Barcelona, Spain, March 27, 2021. REUTERS/ Albert Gea

A healthcare worker collects a swab sample from a woman, before a concert of "Love of Lesbian" that will take place this afternoon with 5,000 spectators at the Palau Sant Jordi, amid the coronavirus disease (COVID-19) pandemic, in Barcelona, Spain, March 27, 2021. REUTERS/ Albert Gea

A woman gets tested for COVID-19 before a concert of "Love of Lesbian", that will take place this afternoon with 5,000 spectators at the Palau Sant Jordi, amid the coronavirus disease (COVID-19) pandemic, in Barcelona, Spain, March 27, 2021. REUTERS/ Albert Gea

Health workers test people for COVID-19 before a concert of "Love of Lesbian", that will take place this afternoon with 5,000 spectators at the Palau Sant Jordi, amid the coronavirus disease (COVID-19) pandemic, in Barcelona, Spain, March 27, 2021. REUTERS/ Albert Gea

A stack of NASA's Artemis rocket solid rocket boosters are shown inside the massive Vehicle Assembly Building at Kennedy Space Center in Cape Canaveral, Florida, U.S. March 24, 2021. REUTERS/Joe Skipper

Cliff Lanham, senior project manager with NASA's Exploration Ground Systems answers a question as a stack of NASA's Artemis rocket solid rocket boosters were shown inside the massive Vehicle Assembly Building at Kennedy Space Center in Cape Canaveral, Florida, U.S. March 24, 2021. REUTERS/Joe Skipper

A stack of one of NASA's Artemis rocket solid rocket boosters are shown inside the massive Vehicle Assembly Building at Kennedy Space Center in Cape Canaveral, Florida, U.S. March 24, 2021. REUTERS/Joe Skipper

Technicians work next to a stack of one of NASA's Artemis rocket solid rocket boosters inside the massive Vehicle Assembly Building at Kennedy Space Center in Cape Canaveral, Florida, U.S. March 24, 2021. REUTERS/Joe Skipper

A stack of NASA's Artemis rocket solid rocket boosters are shown inside the massive Vehicle Assembly Building at Kennedy Space Center in Cape Canaveral, Florida, U.S. March 24, 2021.REUTERS/Joe Skipper

A stack of NASA's Artemis rocket solid rocket boosters are shown inside the massive Vehicle Assembly Building at Kennedy Space Center in Cape Canaveral, Florida, U.S. March 24, 2021. REUTERS/Joe Skipper

A stack of one of NASA's Artemis rocket solid rocket boosters are shown inside the massive Vehicle Assembly Building at Kennedy Space Center in Cape Canaveral, Florida, U.S. March 24, 2021. REUTERS/Joe Skipper

A stack of NASA's Artemis rocket solid rocket boosters are shown inside the massive Vehicle Assembly Building at Kennedy Space Center in Cape Canaveral, Florida, U.S. March 24, 2021. REUTERS/Joe Skipper

A stack of NASA's Artemis rocket solid rocket boosters are shown inside the massive Vehicle Assembly Building at Kennedy Space Center in Cape Canaveral, Florida, U.S. March 24, 2021. REUTERS/Joe Skipper

Mohammed Harun, 27, a Rohingya teacher who lost his parents in a deadly fire in Bangladesh camps, sifts through the charred remains of his hut in Cox's Bazar, Bangladesh, March 24, 2021. REUTERS/Ruma Paul

A Rohingya refugee woman washes utensils at her makeshift tent after a massive fire broke out two days ago in Cox's Bazar, Bangladesh, March 24, 2021. REUTERS/Mohammad Ponir Hossain

A Rohingya refugee carries relief supplies after a massive fire broke out two days ago in Cox's Bazar, Bangladesh, March 24, 2021. REUTERS/Mohammad Ponir Hossain

Rohingya refugees rebuild their shelters after a massive fire broke out two days ago in Cox's Bazar, Bangladesh, March 24, 2021. REUTERS/Mohammad Ponir Hossain

A Rohingya refugee boy carries household stuff that remained after a massive fire broke out two days ago in Cox's Bazar, Bangladesh, March 24, 2021. REUTERS/Mohammad Ponir Hossain

Rohingya refugees rebuild their shelters after a massive fire broke out two days ago in Cox's Bazar, Bangladesh, March 24, 2021. REUTERS/Mohammad Ponir Hossain

A Rohingya refugee woman carries her child after a massive fire broke out two days ago in Cox's Bazar, Bangladesh, March 24, 2021. REUTERS/Mohammad Ponir Hossain

Rohingya refugees rebuild their shelters after a massive fire broke out two days ago in Cox's Bazar, Bangladesh, March 24, 2021. REUTERS/Mohammad Ponir Hossain

A Rohingya refugee woman carries her child as she looks on in a refugee camp after a massive fire broke out two days ago in Cox's Bazar, Bangladesh, March 24, 2021. REUTERS/Mohammad Ponir Hossain

A Rohingya man collects damaged liquefied petroleum gas (LPG) cylinders at a refugee camp after a massive fire broke out two days ago and destroyed thousands of shelters in Cox's Bazar, Bangladesh, March 24, 2021. REUTERS/Mohammad Ponir Hossain

Men collect damaged liquefied petroleum gas (LPG) cylinders at a refugee camp after a massive fire broke out two days ago and destroyed thousands of shelters in Cox's Bazar, Bangladesh, March 24, 2021. REUTERS/Mohammad Ponir Hossain

A general view of the Rohingya refugee camp after a massive fire broke out two days ago and destroyed thousands of shelters in Cox's Bazar, Bangladesh, March 24, 2021. REUTERS/Mohammad Ponir Hossain

A Rohingya refugee child reacts to the camera in a refugee camp where a massive fire broke out two days ago and destroyed thousands of shelters in Cox's Bazar, Bangladesh, March 24, 2021. REUTERS/Mohammad Ponir Hossain

A Rohingya refugee child reacts to the camera in a refugee camp where a massive fire broke out two days ago and destroyed thousands of shelters in Cox's Bazar, Bangladesh, March 24, 2021. REUTERS/Mohammad Ponir Hossain

Rohingya refugees search for valuable materials, such as gold, in the ashes after a massive fire broke out two days ago and destroyed thousands of shelters in Cox's Bazar, Bangladesh, March 24, 2021. REUTERS/Mohammad Ponir Hossain

A Rohingya refugee girl is seen in front of newly erected makeshift tents after a massive fire broke out and destroyed thousands of shelters in a Rohingya refugee camp in Cox's Bazar, Bangladesh, March 24, 2021. REUTERS/Mohammad Ponir Hossain

A Rohingya refugee boy sits on a stack of burned material after a massive fire broke out and destroyed thousands of shelters in a Rohingya refugee camp in Cox's Bazar, Bangladesh, March 24, 2021. REUTERS/Mohammad Ponir Hossain

A Rohingya refugee boy looks on in a refugee camp where a massive fire broke out two days ago, Cox's Bazar, Bangladesh, March 24, 2021. REUTERS/Mohammad Ponir Hossain TPX IMAGES OF THE DAY

Rohingya refugees search for valuable materials, such as gold, in the ashes after a massive fire broke out two days ago and destroyed thousands of shelters in Cox's Bazar, Bangladesh, March 24, 2021. REUTERS/Mohammad Ponir Hossain

Rohingya refugees search for valuable materials, such as gold, in the ashes after a massive fire broke out two days ago and destroyed thousands of shelters in Cox's Bazar, Bangladesh, March 24, 2021. REUTERS/Mohammad Ponir Hossain

Fire is seen at the Rohingya refugee camp where a massive fire broke out two days ago and destroyed thousands of shelters in Cox's Bazar, Bangladesh, March 24, 2021. REUTERS/Mohammad Ponir Hossain

Newly built makeshift tents are seen at the Rohingya refugee camp where a massive fire destroyed thousands of shelters in Cox's Bazar, Bangladesh, March 24, 2021. REUTERS/Mohammad Ponir Hossain