Netgear Chairman and CEO Patrick Lo poses for a picture, unknown location, in this undated picture obtained by Reuters. Netgear/Handout via REUTERS

Egyptian pilot Nader El Khayat and unknown's co-pilot of Cross Country Rally team competes in the O West Rally 2021 organized by Bosla, amid the coronavirus disease (COVID-19) pandemic in Giza, Egypt February 20, 2021. REUTERS/Amr Abdallah Dalsh

A former chewing gum vending machine pasted with coronavirus vaccine logos by unknown persons is pictured at Prenzlauerberg district, amid the coronavirus disease (COVID-19) pandemic during lockdown, in Berlin, Germany, February 16, 2021. REUTERS/Fabrizio Bensch

A former chewing gum vending machine pasted with coronavirus vaccine logos by unknown persons is pictured at Prenzlauerberg district, amid the coronavirus disease (COVID-19) pandemic during lockdown, in Berlin, Germany, February 16, 2021. REUTERS/Fabrizio Bensch

A former chewing gum vending machine pasted with coronavirus vaccine logos by unknown persons is pictured at Prenzlauerberg district, amid the coronavirus disease (COVID-19) pandemic during lockdown, in Berlin, Germany, February 16, 2021. REUTERS/Fabrizio Bensch

A former chewing gum vending machine pasted with coronavirus vaccine logos by unknown persons is pictured at Prenzlauerberg district, amid the coronavirus disease (COVID-19) pandemic during lockdown, in Berlin, Germany, February 16, 2021. REUTERS/Fabrizio Bensch

A Greek Presidential Guard wearing a protective face mask stands guard in front of the Tomb of the Unknown Soldier during heavy snowfall in Athens, Greece, February 16, 2021. REUTERS/Costas Baltas

A Greek Presidential Guard wearing a protective face mask stands guard in front of the Tomb of the Unknown Soldier during heavy snowfall in Athens, Greece, February 16, 2021. REUTERS/Costas Baltas

A police officer and a Presidential Guard wearing protective face masks stand guard in front of the Tomb of the Unknown Soldier, during a demonstration of Greek university students against government plans to set up a university police, amid the coronavirus disease (COVID-19) pandemic, in Athens, Greece, January 28, 2021. REUTERS/Alkis Konstantinidis

Police officers, wearing protective face masks and applying social distancing, stand guard in front of the Tomb of the Unknown Soldier where a Presidential Guard performs his sentry duty, during a demonstration of Greek university students against government plans to set up a university police, amid the coronavirus disease (COVID-19) pandemic, in Athens, Greece, January 21, 2021. REUTERS/Alkis Konstantinidis

U.S. first lady Dr. Jill Biden walks before U.S. President Joe Biden and U.S. Vice President Kamala Harris as they arrive to lay a wreath at the Tomb of the Unknown Soldier at Arlington National Cemetery in Washington, U.S., January 20, 2021. REUTERS/Joshua Roberts/Pool

U.S. first lady Dr. Jill Biden walks past former President Bill Clinton and Hillary Clinton and former President George W. Bush and Laura Bush as U.S. President Joe Biden and U.S. Vice President Kamala Harris arrive to lay a wreath at the Tomb of the Unknown Soldier at Arlington National Cemetery in Washington, U.S., January 20, 2021. REUTERS/Joshua Roberts/Pool

U.S. first lady Dr. Jill Biden walks past former President Barack Obama and Michelle Obama as U.S. President Joe Biden and U.S. Vice President Kamala Harris arrive to lay a wreath at the Tomb of the Unknown Soldier at Arlington National Cemetery in Washington, U.S., January 20, 2021. REUTERS/Joshua Roberts/Pool

U.S. President Joe Biden and U.S. Vice President Kamala Harris walk together after laying a wreath at the Tomb of the Unknown Soldier at Arlington National Cemetery in Washington, U.S., January 20, 2021. REUTERS/Joshua Roberts/Pool

U.S. President Joe Biden, Vice President Kamala D. Harris, Major General Omar J. Jones, Former U.S. president Barack Obama and his wife Michelle Obama attend a wreath laying ceremony at the Tomb of the Unknown Soldier at the Arlington National Cemetery, in Arlington, Virginia, U.S., January 20, 2021. REUTERS/Joshua Roberts/Pool

U.S. President Joe Biden, Vice President Kamala D. Harris and Major General Omar J. Jones walk as they attend a wreath laying ceremony at the Tomb of the Unknown Soldier at the Arlington National Cemetery, in Arlington, Virginia, U.S., January 20, 2021. REUTERS/Joshua Roberts/Pool

U.S. President Joe Biden, Vice President Kamala D. Harris and Major General Omar J. Jones walk as they attend a wreath laying ceremony at the Tomb of the Unknown Soldier at the Arlington National Cemetery, in Arlington, Virginia, U.S., January 20, 2021. REUTERS/Joshua Roberts/Pool

U.S. President Joe Biden salutes as he attends a wreath laying ceremony at the Tomb of the Unknown Soldier at the Arlington National Cemetery, in Arlington, Virginia, U.S., January 20, 2021. REUTERS/Joshua Roberts/Pool

U.S. President Joe Biden and Vice President Kamala D. Harris attend a wreath laying ceremony at the Tomb of the Unknown Soldier at the Arlington National Cemetery, in Arlington, Virginia, U.S., January 20, 2021. Katherine Frey/Pool via REUTERS

U.S. President Joe Biden, Vice President Kamala D. Harris and Major General Omar J. Jones walk up the stairs as they attend a wreath laying ceremony at the Tomb of the Unknown Soldier at the Arlington National Cemetery, in Arlington, Virginia, U.S., January 20, 2021. REUTERS/Joshua Roberts/Pool

U.S. President Joe Biden, Vice President Kamala D. Harris and Maj. Gen Omar J. Jones, commanding general, Joint Task Force attend a wreath laying ceremony at the Tomb of the Unknown Soldier at the Arlington National Cemetery, in Arlington, Virginia, U.S., January 20, 2021. Katherine Frey/Pool via REUTERS

U.S. President Joe Biden, Vice President Kamala D. Harris and Major General Omar J. Jones walk up the stairs as they attend a wreath laying ceremony at the Tomb of the Unknown Soldier at the Arlington National Cemetery, in Arlington, Virginia, U.S., January 20, 2021. REUTERS/Joshua Roberts/Pool

U.S. President Joe Biden, Vice President Kamala D. Harris, Major General Omar J. Jones, U.S. first lady Jill Biden, U.S. former President Bill Clinton with wife, former Secretary of State, Hillary Clinton, Former U.S. President George W. Bush with his wife Laura Bush,Former U.S. president Barack Obama and his wife Michelle Obama attend a wreath laying ceremony at the Tomb of the Unknown Soldier at the Arlington National Cemetery, in Arlington, Virginia, U.S., January 20, 2021. REUTERS/Joshua Roberts/Pool

U.S. former President Bill Clinton with wife, former Secretary of State, Hillary Clinton, Former U.S. President George W. Bush with his wife Laura Bush, Former U.S. president Barack Obama and his wife Michelle Obama attend a wreath laying ceremony at the Tomb of the Unknown Soldier at the Arlington National Cemetery, in Arlington, Virginia, U.S., January 20, 2021. REUTERS/Joshua Roberts/Pool

U.S. President Joe Biden, Vice President Kamala D. Harris, Major General Omar J. Jones, U.S. first lady Jill Biden, U.S. former President Bill Clinton with wife, former Secretary of State, Hillary Clinton, Former U.S. President George W. Bush with his wife Laura Bush,Former U.S. president Barack Obama and his wife Michelle Obama attend a wreath laying ceremony at the Tomb of the Unknown Soldier at the Arlington National Cemetery, in Arlington, Virginia, U.S., January 20, 2021. REUTERS/Joshua Roberts/Pool

U.S. President Joe Biden attends a wreath laying ceremony at the Tomb of the Unknown Soldier at the Arlington National Cemetery, in Arlington, Virginia, U.S., January 20, 2021. REUTERS/Joshua Roberts/Pool

U.S. President Joe Biden and Vice President Kamala D. Harris attend a wreath laying ceremony at the Tomb of the Unknown Soldier at the Arlington National Cemetery, in Arlington, Virginia, U.S., January 20, 2021. REUTERS/Joshua Roberts/Pool

U.S. President Joe Biden, Vice President Kamala D. Harris, Major General Omar J. Jones, U.S. former President Bill Clinton with wife, former Secretary of State, Hillary Clinton, Former U.S. President George W. Bush with his wife Laura Bush,Former U.S. president Barack Obama and his wife Michelle Obama attend a wreath laying ceremony at the Tomb of the Unknown Soldier at the Arlington National Cemetery, in Arlington, Virginia, U.S., January 20, 2021. REUTERS/Joshua Roberts/Pool

U.S. President Joe Biden, Vice President Kamala D. Harris and Major General Omar J. Jones attend a wreath laying ceremony at the Tomb of the Unknown Soldier at the Arlington National Cemetery, in Arlington, Virginia, U.S., January 20, 2021. REUTERS/Joshua Roberts/Pool

U.S. President Joe Biden and Vice President Kamala D. Harris attend a wreath laying ceremony at the Tomb of the Unknown Soldier at the Arlington National Cemetery, in Arlington, Virginia, U.S., January 20, 2021. Katherine Frey/Pool via REUTERS

U.S. President Joe Biden, Vice President Kamala D. Harris and Major General Omar J. Jones salute at the Tomb of the Unknown Soldier at the Arlington National Cemetery, in Arlington, Virginia, U.S., January 20, 2021. REUTERS/Joshua Roberts/Pool

U.S. President Joe Biden, Vice President Kamala D. Harris and Major General Omar J. Jones attend a wreath laying ceremony at the Tomb of the Unknown Soldier at the Arlington National Cemetery, in Arlington, Virginia, U.S., January 20, 2021. REUTERS/Joshua Roberts/Pool

U.S. President Joe Biden, Vice President Kamala D. Harris and Major General Omar J. Jones salute at the Tomb of the Unknown Soldier at the Arlington National Cemetery, in Arlington, Virginia, U.S., January 20, 2021. REUTERS/Joshua Roberts/Pool

U.S. President Joe Biden and Vice President Kamala D. Harris attend a wreath laying ceremony at the Tomb of the Unknown Soldier at the Arlington National Cemetery, in Arlington, Virginia, U.S., January 20, 2021. REUTERS/Joshua Roberts/Pool

U.S. President Joe Biden and Vice President Kamala D. Harris attend a wreath laying ceremony at the Tomb of the Unknown Soldier at the Arlington National Cemetery, in Arlington, Virginia, U.S., January 20, 2021. REUTERS/Joshua Roberts/Pool

U.S. President Joe Biden and Vice President Kamala D. Harris attend a wreath laying ceremony at the Tomb of the Unknown Soldier at the Arlington National Cemetery, in Arlington, Virginia, U.S., January 20, 2021. REUTERS/Joshua Roberts/Pool

U.S. President Joe Biden salutes at the Tomb of the Unknown Soldier at the Arlington National Cemetery, in Arlington, Virginia, U.S., January 20, 2021. REUTERS/Joshua Roberts/Pool

U.S. President Joe Biden and Vice President Kamala D. Harris attend a wreath laying ceremony at the Tomb of the Unknown Soldier at the Arlington National Cemetery, in Arlington, Virginia, U.S., January 20, 2021. REUTERS/Joshua Roberts/Pool

U.S. President Joe Biden salutes at the Tomb of the Unknown Soldier at the Arlington National Cemetery, in Arlington, Virginia, U.S., January 20, 2021. REUTERS/Joshua Roberts/Pool

U.S. President Joe Biden, Vice President Kamala D. Harris and Major General Omar J. Jones salute at the Tomb of the Unknown Soldier at the Arlington National Cemetery, in Arlington, Virginia, U.S., January 20, 2021. REUTERS/Joshua Roberts/Pool

A screenshot obtained January 20, 2021, shows HTML code on https://www.whitehouse.gov/ containing an invitation to join the U.S. Digital Service, a technology unit within the White House. REUTERS

White House Marine sentries secure the East Front door of the U.S. Capitol during an unknown external security threat, in Washington, U.S., January 18, 2021. Jim Lo Scalzo/Pool via REUTERS

Russian opposition leader Alexei Navalny and his wife Yulia Navalnaya are seen on board a plane during a flight from Berlin to Moscow, January 17, 2021. REUTERS/Polina Ivanova

Russian opposition leader Alexei Navalny and his wife Yulia Navalnaya are seen on board a plane during a flight from Berlin to Moscow, January 17, 2021. REUTERS/Polina Ivanova

Children watch as the body of one of the female judges shot dead by unknown gunmen is carried by her relatives after an attack in Kabul, Afghanistan January 17, 2021. REUTERS/Mohammad Ismail

Relatives carry the body of one of the female judges shot dead by unknown gunmen in Kabul, Afghanistan January 17, 2021. REUTERS/Mohammad Ismail TPX IMAGES OF THE DAY

Relatives carry the body of one of the female judges shot dead by unknown gunmen in Kabul, Afghanistan January 17, 2021. REUTERS/Mohammad Ismail

Relatives carry the body of one of the female judges shot dead by unknown gunmen in Kabul, Afghanistan January 17, 2021. REUTERS/Mohammad Ismail

Christian Angelo Hill, 19, a Black Lives Matter supporter, is helped by others after being sprayed with an unknown substance during a rally held by U.S. President Donald Trump supporters, in Los Angeles, California, U.S., January 6, 2021. REUTERS/Mike Blake

Christian Angelo Hill, 19, a Black Lives Matter supporter, runs away from Trump supporters after being sprayed with an unknown substance during a rally held by U.S. President Donald Trump supporters, in Los Angeles, California, U.S., January 6, 2021. REUTERS/Mike Blake

Christian Angelo Hill, 19, a Black Lives Matter supporter, runs away from Trump supporters after being sprayed with an unknown substance during a rally held by U.S. President Donald Trump supporters, in Los Angeles, California, U.S., January 6, 2021. REUTERS/Mike Blake

Christian Angelo Hill, 19, a Black Lives Matter supporter, reacts after being sprayed with an unknown substance during a rally held by U.S. President Donald Trump supporters, in Los Angeles, California, U.S., January 6, 2021. REUTERS/Mike Blake

Christian Angelo Hill, 19, a Black Lives Matter supporter, reacts after being sprayed with an unknown substance during a rally held by U.S. President Donald Trump supporters, in Los Angeles, California, U.S., January 6, 2021. REUTERS/Mike Blake

Christian Angelo Hill, 19, a Black Lives Matter supporter, reacts after being sprayed with an unknown substance during a rally held by U.S. President Donald Trump supporters, in Los Angeles, California, U.S., January 6, 2021. REUTERS/Mike Blake

Christian Angelo Hill, 19, a Black Lives Matter supporter, reacts after being sprayed with an unknown substance during a rally held by U.S. President Donald Trump supporters, in Los Angeles, California, U.S., January 6, 2021. REUTERS/Mike Blake

A police officer stands guard outside of the Regional Hospital No. 35 of the Mexican Social Security Institute (IMSS), where unknown assailants entered the hospitals' premises and gunned down a patient, according to local media, in Ciudad Juarez, Mexico December 29, 2020. REUTERS/Jose Luis Gonzalez

A police officer stands guard outside of the Regional Hospital No. 35 of the Mexican Social Security Institute (IMSS), where unknown assailants entered the hospitals' premises and gunned down a patient, according to local media, in Ciudad Juarez, Mexico December 29, 2020. REUTERS/Jose Luis Gonzalez

Soldiers assigned to the National Guard stand guard outside of the Regional Hospital No. 35 of the Mexican Social Security Institute (IMSS), where unknown assailants entered the hospitals' premises and gunned down a patient, according to local media, in Ciudad Juarez, Mexico December 29, 2020. REUTERS/Jose Luis Gonzalez

A soldier assigned to the National Guard stands guard outside of the Regional Hospital No. 35 of the Mexican Social Security Institute (IMSS), where unknown assailants entered the hospitals' premises and gunned down a patient, according to local media, in Ciudad Juarez, Mexico December 29, 2020. REUTERS/Jose Luis Gonzalez

An unknown healthcare worker receives an injection with a dose of Pfizer-BioNTech COVID-19 vaccine at the University Hospital, as the coronavirus disease (COVID-19) outbreak continues, in Nitra, Slovakia, December 26, 2020. REUTERS/Radovan Stoklasa