African children arrive for lessons on a rooftop at the Future Generation Center for Education (FGCE) which was founded by a Sudanese family to assist refugees hit by the pandemic in Giza Province's Barageel, Egypt February 24, 2021. Picture taken February 24, 2021. REUTERS/Amr Abdallah Dalsh

Palestinian Tayseer Abu Dan works on his rooftop which he turned to a garden to supply his family with vegetables, in Khan Younis refugee camp in the southern Gaza Strip March 1, 2021. Picture taken March 1, 2021. REUTERS/Ibraheem Abu Mustafa

A picture taken with a drone shows Palestinian Tayseer Abu Dan's rooftop which he turned to a garden to supply his family with vegetables, in Khan Younis refugee camp in the southern Gaza Strip March 1, 2021. Picture taken March 1, 2021. REUTERS/Mohammed Salem

A boy looks out of a window as Palestinian Tayseer Abu Dan works on his rooftop which he turned to a garden to supply his family with vegetables, in Khan Younis refugee camp in the southern Gaza Strip March 1, 2021. Picture taken March 1, 2021. REUTERS/Ibraheem Abu Mustafa

Palestinian Tayseer Abu Dan works on his rooftop which he turned to a garden to supply his family with vegetables, in Khan Younis refugee camp in the southern Gaza Strip March 1, 2021. Picture taken March 1, 2021. REUTERS/Ibraheem Abu Mustafa

A view shows Palestinian Tayseer Abu Dan's rooftop which he turned to a garden to supply his family with vegetables, in Khan Younis refugee camp in the southern Gaza Strip March 1, 2021. Picture taken March 1, 2021. REUTERS/Ibraheem Abu Mustafa

A view shows Palestinian Tayseer Abu Dan's rooftop which he turned to a garden to supply his family with vegetables, in Khan Younis refugee camp in the southern Gaza Strip March 1, 2021. Picture taken March 1, 2021. REUTERS/Ibraheem Abu Mustafa

An artisan roofer repairs city rooftops and chimney stacks on residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

An artisan roofer repairs city rooftops and chimney stacks on residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

An artisan roofer repairs city rooftops and chimney stacks on residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

An artisan roofer repairs city rooftops and chimney stacks on residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

An artisan roofer repairs city rooftops and chimney stacks on residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

A view shows city rooftops and chimney stacks of residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

A view shows city rooftops and chimney stacks of residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

A view shows city rooftops and chimney stacks of residential apartment buildings near the Eiffel Tower in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

Women have a picnic on the rooftop of a residential apartment building in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes TPX IMAGES OF THE DAY

A view shows city rooftops and chimney stacks of residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

A view shows city rooftops and chimney stacks of residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

An artisan roofer repairs city rooftops and chimney stacks on residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

Olivier Boileau Descamps General secretary at support committee of the UNESCO Commission on intangible cultural heritage walks at city rooftop of a residential apartment building in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

A view shows city rooftops and chimney stacks of residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

A view shows city rooftops and chimney stacks of residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

A view shows city rooftops and chimney stacks of residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

Smoke from chimneys billows over the rooftops of downtown Prague as freezing temperatures hit the country, Czech Republic, February 14, 2021. REUTERS/David W Cerny

Smoke from chimneys billows over the rooftops of downtown Prague as freezing temperatures hit the country, Czech Republic, February 14, 2021. REUTERS/David W Cerny

Smoke from chimneys billows over the rooftops of downtown Prague as freezing temperatures hit the country, Czech Republic, February 14, 2021. REUTERS/David W Cerny

Smoke from chimneys billows over the rooftops of downtown Prague as freezing temperatures hit the country, Czech Republic, February 14, 2021. REUTERS/David W Cerny

Smoke from chimneys billows over the rooftops of downtown Prague as freezing temperatures hit the country, Czech Republic, February 14, 2021. REUTERS/David W Cerny

Smoke from chimneys billows over the rooftops of downtown Prague as freezing temperatures hit the country, Czech Republic, February 14, 2021. REUTERS/David W Cerny

Smoke from chimneys billows over the rooftops of downtown Prague as freezing temperatures hit the country, Czech Republic, February 14, 2021. REUTERS/David W Cerny

Smoke from chimneys billows over the rooftops of downtown Prague as freezing temperatures hit the country, Czech Republic, February 14, 2021. REUTERS/David W Cerny

Smoke from chimneys billows over the rooftops of downtown Prague as freezing temperatures hit the country, Czech Republic, February 14, 2021. REUTERS/David W Cerny

Smoke from chimneys billows over the rooftops of downtown Prague as freezing temperatures hit the country, Czech Republic, February 14, 2021. REUTERS/David W Cerny TPX IMAGES OF THE DAY

Smoke from chimneys billows over the rooftops of downtown Prague as freezing temperatures hit the country, Czech Republic, February 14, 2021. REUTERS/David W Cerny

People dine outdoors on a restaurant?s rooftop during the outbreak of coronavirus disease (COVID-19) in the Ocean Beach neighborhood of San Diego, California, U.S., February 13, 2021. REUTERS/Bing Guan

A Palestinian youth adjusts his friend's clothing as Israel partially lifts its third national lockdown to fight the coronavirus disease (COVID-19) crisis, at a skate park in Jerusalem February 7, 2021. Picture taken February 7, 2021. REUTERS/Ammar Awad?

Palestinian youths hold their skateboards while walking past shuttered shops as Israel partially lifts its third national lockdown to fight the coronavirus disease (COVID-19) crisis, in Jerusalem's Old City February 7, 2021. Picture taken February 7, 2021. REUTERS/Ammar Awad

Palestinian youths lie on the ground while holding their skateboards amid Israel's third national lockdown to fight the coronavirus disease (COVID-19) crisis, at a skate park in Jerusalem February 2, 2021. Picture taken February 2, 2021. REUTERS/Ammar Awad

Palestinian youths hold their skateboards while chatting, as Israel partially lifts its third national lockdown to fight the coronavirus disease (COVID-19) crisis, in Jerusalem's Old City February 7, 2021. Picture taken February 7, 2021. REUTERS/Ammar Awad

An aerial view shows people at a skate park as Israel partially lifts its third national lockdown to fight the coronavirus disease (COVID-19) crisis, in Jerusalem February 7, 2021. Picture taken February 7, 2021. Picture taken with a drone. REUTERS/Ammar Awad

Palestinian youths hold their skateboards while sitting together, as Israel partially lifts its third national lockdown to fight the coronavirus disease (COVID-19) crisis, in Jerusalem's Old City February 7, 2021. Picture taken February 7, 2021. REUTERS/Ammar Awad

A Palestinian youth skateboards as Israel partially lifts its third national lockdown to fight the coronavirus disease (COVID-19) crisis, at a skate park in Jerusalem February 7, 2021. Picture taken February 7, 2021. REUTERS/Ammar Awad

A Palestinian youth skateboards as Israel partially lifts its third national lockdown to fight the coronavirus disease (COVID-19) crisis, at a skate park in Jerusalem February 7, 2021. Picture taken February 7, 2021. REUTERS/Ammar Awad

The Dome of the Rock located on the compound known to Muslims as Noble Sanctuary and to Jews as Temple Mount is seen in the background as Palestinian youths hold their skateboards while standing on a rooftop, as Israel partially lifts its third national lockdown to fight the coronavirus disease (COVID-19) crisis, in Jerusalem's Old City February 7, 2021. Picture taken February 7, 2021. REUTERS/Ammar Awad

A Palestinian youth jumps with his skateboard on a rooftop as the Dome of the Rock located on the compound known to Muslims as Noble Sanctuary and to Jews as Temple Mount is seen in the background, as Israel partially lifts its third national lockdown to fight the coronavirus disease (COVID-19) crisis, in Jerusalem's Old City February 7, 2021. Picture taken February 7, 2021. REUTERS/Ammar Awad

The Dome of the Rock located on the compound known to Muslims as Noble Sanctuary and to Jews as Temple Mount is seen in the background as Palestinian youths skateboard on rooftops, as Israel partially lifts its third national lockdown to fight the coronavirus disease (COVID-19) crisis, in Jerusalem's Old City February 7, 2021. Picture taken February 7, 2021. REUTERS/Ammar Awad

Palestinian youths carry their skateboards as they walk past ultra-Orthodox Jewish men as Israel partially lifts its third national lockdown to fight the coronavirus disease (COVID-19) crisis, in Jerusalem's Old City February 7, 2021. Picture taken February 7, 2021. REUTERS/Ammar Awad

Palestinian youths sit on their skateboards on a rooftop as the Dome of the Rock located on the compound known to Muslims as Noble Sanctuary and to Jews as Temple Mount is seen in the background, as Israel partially lifts its third national lockdown to fight the coronavirus disease (COVID-19) crisis, in Jerusalem's Old City February 7, 2021. Picture taken February 7, 2021. REUTERS/Ammar Awad

Palestinian youths skateboard, as Israel partially lifts its third national lockdown to fight the coronavirus disease (COVID-19) crisis, at a skate park in Jerusalem February 7, 2021. Picture taken February 7, 2021. REUTERS/Ammar Awad?

A tattoo of a broken skateboard is seen on the leg of a Palestinian youth as he takes a break from skateboarding as Israel partially lifts its third national lockdown to fight the coronavirus disease (COVID-19) crisis, in Jerusalem's Old City February 7, 2021. Picture taken February 7, 2021. REUTERS/Ammar Awad

Palestinian youths skateboard, as Israel partially lifts its third national lockdown to fight the coronavirus disease (COVID-19) crisis, at a skate park in Jerusalem February 7, 2021. Picture taken February 7, 2021. REUTERS/Ammar Awad?

People look at snow-covered rooftops of central Prague, Czech Republic, February 8, 2021. REUTERS/David W Cerny

Rooftops covered in snow are pictured in Dover, Kent, Britain February 7, 2021. REUTERS/Matthew Childs

Rooftops covered in snow are pictured in Dover, Kent, Britain February 7, 2021. REUTERS/Matthew Childs

A resident jumps onto another building from a rooftop inside a locked down portion of the Jordan residential area to contain a new outbreak of the coronavirus disease (COVID-19), in Hong Kong, China January 23, 2021. REUTERS/Tyrone Siu

A resident stands on a rooftop inside a locked down portion of the Jordan residential area to contain a new outbreak of the coronavirus disease (COVID-19), in Hong Kong, China January 23, 2021. REUTERS/Tyrone Siu

People, some wearing face masks, hang out at a rooftop terrace amid the coronavirus disease (COVID-19) outbreak, in Madrid, Spain January 22, 2021. REUTERS/Susana Vera

People, some wearing face masks, hang out at a rooftop terrace amid the coronavirus disease (COVID-19) outbreak, in Madrid, Spain January 22, 2021. REUTERS/Susana Vera

A member of the Secret Service holds a sniper rifle on a rooftop overlooking the Inauguration Day parade for U.S. President Joe Biden in Washington, U.S., January 20, 2021. REUTERS/Erin Scott