A volunteer sets up preparations for U.S. President-elect Joe Biden's inauguration, in Washington, D.C., U.S., January 18, 2021. REUTER/Andrew Kelly

U.S. Vice President-elect Kamala Harris talks to reporters at Martha's Table on Martin Luther King Day in Washington, U.S. January 18, 2021. REUTERS/Erin Scott

U.S. Vice President-elect Kamala Harris waves near her husband Doug Emhoff as they volunteer at Martha's Table on Martin Luther King Day in Washington, U.S. January 18, 2021. REUTERS/Erin Scott

U.S. Vice President-elect Kamala Harris talks to reporters at Martha's Table on Martin Luther King Day in Washington, U.S. January 18, 2021. REUTERS/Erin Scott

A senior citizen receives the Pfizer-BioNTech coronavirus disease (COVID-19) vaccine at a vaccination center in the city hall of Paris Centre, France, January 18, 2021. REUTERS/Benoit Tessier

Bryson King, 5, has fun after posing for a photo as he and his mother visit the King Historic District on Martin Luther King Jr. Day, in Atlanta, Georgia, U.S. January 18, 2021. REUTERS/Chris Aluka Berry

Dr. Bernice King passes by her parents' tombs at the conclusion of the wreath laying ceremony during Martin Luther King Jr., Day in Atlanta, Georgia, U.S. January 18, 2021. REUTERS/Chris Aluka Berry

People depart the tombs of Martin Luther King Jr. and Coretta Scott King at the conclusion of the wreath laying ceremony during Martin Luther King, Jr. Day in Atlanta, Georgia, U.S. January 18, 2021. REUTERS/Chris Aluka Berry

People bow their heads in prayer during the wreath laying ceremony at the tomb of Martin Luther King Jr. and Coretta Scott King, during Martin Luther King, Jr. Day in Atlanta, Georgia, U.S. January 18, 2021. The historic Ebenezar Baptist Church is seen in the background. REUTERS/Chris Aluka Berry

Family members of Dr. Martin Luther King Jr. sing "We Shall Overcome" during the wreath laying ceremony at the tomb of Martin Luther King Jr. and Coretta Scott King during Martin Luther King, Jr., Day in Atlanta, Georgia, U.S. January 18, 2021. REUTERS/ Chris Aluka Berry

Martin Luther King Jr.'s sister, Christine King Farris, raises her hands during the wreath laying ceremony at the tomb of Martin Luther King Jr. and Coretta Scott King during Martin Luther King, Jr., Day in Atlanta, Georgia, U.S. January 18, 2021. REUTERS/Chris Aluka Berry

Family members and friends lay a wreath at the tomb of Martin Luther King Jr. and Coretta Scott King during Martin Luther King, Jr., Day in Atlanta, Georgia, U.S. January 18, 2021. REUTERS/Chris Aluka Berry

Family members lay a wreath at the tomb of Martin Luther King Jr. and Coretta Scott King during Martin Luther King, Jr. Day in Atlanta, Georgia, U.S. January 18, 2021. REUTERS/Chris Aluka Berry

Dr. Bernice King, center, is joined by a family member as they lay a wreath at the tomb of Martin Luther King, Jr. and Coretta Scott King during Martin Luther King Jr. Day, in Atlanta, Georgia, U.S. January 18, 2021. REUTERS/ Chris Aluka Berry

Black Lives Matter demonstrators stand on the lawn of Ebenezer Baptist Church on Martin Luther King, Jr. Day in Atlanta, Georgia, U.S. January 18, 2021. REUTERS/ Chris Aluka Berry

Teresinha Conceicao receives the Sinovac coronavirus disease (COVID-19) vaccine at Christ the Redeemer statue in Rio de Janeiro, Brazil January 18, 2021. REUTERS/Ricardo Moraes

Dulcineia da Silva Lopes gestures near Teresinha Conceicao after receiving the Sinovac coronavirus disease (COVID-19) vaccine at Christ the Redeemer statue in Rio de Janeiro, Brazil January 18, 2021. REUTERS/Ricardo Moraes

Dulcineia da Silva Lopes receives the Sinovac coronavirus disease (COVID-19) vaccine at Christ the Redeemer statue in Rio de Janeiro, Brazil January 18, 2021. REUTERS/Ricardo Moraes

Teresinha Conceicao receives the Sinovac coronavirus disease (COVID-19) vaccine at Christ the Redeemer statue in Rio de Janeiro, Brazil January 18, 2021. REUTERS/Ricardo Moraes

Dulcineia da Silva Lopes receives the Sinovac coronavirus disease (COVID-19) vaccine at Christ the Redeemer statue in Rio de Janeiro, Brazil January 18, 2021. REUTERS/Ricardo Moraes

The moon is seen next to the Christ the Redeemer statue amid the coronavirus disease (COVID-19) outbreak in Rio de Janeiro Brazil January 18, 2021. REUTERS/Ricardo Moraes

President Faustin-Archange Touadera greets supporters after highest court confirmed his re-election at his party headquarter in Bangui, Central Africa Republic January 18, 2021. REUTERS/Antoine Rolland

Supporters of President Faustin-Archange Touadera celebrate after highest court confirmed the re-election of Touadera, in Bangui, Central Africa Republic January 18, 2021. REUTERS/Antoine Rolland

President Faustin-Archange Touadera greets supporters after highest court confirmed his re-election at his party headquarter in Bangui, Central Africa Republic January 18, 2021. REUTERS/Antoine Rolland

President Faustin-Archange Touadera greets supporters after highest court confirmed his re-election at his party headquarter in Bangui, Central Africa Republic January 18, 2021. REUTERS/Antoine Rolland

A nurse administers a coronavirus disease (COVID-19) test at a drive-through testing event targeting underserved communities on Martin Luther King day in Philadelphia, Pennsylvania, U.S., January 18, 2021. REUTERS/Hannah Beier

Teresinha Conceicao receives the Sinovac coronavirus disease (COVID-19) vaccine at Christ the Redeemer statue in Rio de Janeiro, Brazil January 18, 2021. REUTERS/Ricardo Moraes

Soccer Football - Serie A - Cagliari v AC Milan - Sardegna Arena, Cagliari, Italy - January 18, 2021 General view of AC Milan's Zlatan Ibrahimovic's tattoo after the match REUTERS/Alberto Lingria

Soccer Football - Serie A - Cagliari v AC Milan - Sardegna Arena, Cagliari, Italy - January 18, 2021 AC Milan's Zlatan Ibrahimovic takes off his shirt after the match REUTERS/Alberto Lingria

Soccer Football - Serie A - Cagliari v AC Milan - Sardegna Arena, Cagliari, Italy - January 18, 2021 AC Milan's Zlatan Ibrahimovic and Alessio Romagnoli speak with ball boys after the match REUTERS/Alberto Lingria

Oduno Tarik jumps rope as members of "Don't Mute DC" and "Living With The Law" perform during the MLK Community Service Day celebration in Washington D.C., days ahead of U.S. President-elect Joe Biden's inauguration, U.S. January 18, 2021. REUTERS/Brandon Bell

A woman prepares small bags of detergent for sale near her stall outside her house as the spread of the coronavirus disease (COVID-19) continues, in Medina neighbourhood, Dakar, Senegal January 18, 2021. REUTERS/Zohra Bensemra

Soccer Football - Serie A - Cagliari v AC Milan - Sardegna Arena, Cagliari, Italy - January 18, 2021 AC Milan's Zlatan Ibrahimovic and Cagliari's Radja Nainggolan after the match REUTERS/Alberto Lingria

A woman prepares couscous as the spread of the coronavirus disease (COVID-19) continues, in Medina neighbourhood, Dakar, Senegal January 18, 2021. REUTERS/Zohra Bensemra

A woman prepares couscous as the spread of the coronavirus disease (COVID-19) continues, in Medina neighbourhood, Dakar, Senegal January 18, 2021. REUTERS/Zohra Bensemra

A woman prepares couscous while another washes dishes at their house as the spread of the coronavirus disease (COVID-19) continues, in Medina neighbourhood, Dakar, Senegal January 18, 2021. REUTERS/Zohra Bensemra

A woman prepares couscous while another washes dishes at their house as the spread of the coronavirus disease (COVID-19) continues, in Medina neighbourhood, Dakar, Senegal January 18, 2021. REUTERS/Zohra Bensemra

People visit the King Historic District on Martin Luther King, Jr. Day in Atlanta, Georgia, U.S. January 18, 2021. REUTERS/ Chris Aluka Berry

Soccer Football - Serie A - Cagliari v AC Milan - Sardegna Arena, Cagliari, Italy - January 18, 2021 AC Milan's Zlatan Ibrahimovic and Gianluigi Donnarumma celebrate after the match REUTERS/Alberto Lingria

Soccer Football - Serie A - Cagliari v AC Milan - Sardegna Arena, Cagliari, Italy - January 18, 2021 AC Milan coach Stefano Pioli and AC Milan's Zlatan Ibrahimovic after the match REUTERS/Alberto Lingria

People listen as members of "Don't Mute DC" and "Living With The Law" perform to celebrate MLK Community Service Day in Washington D.C., days ahead of U.S. President-elect Joe Biden's inauguration, U.S. January 18, 2021. REUTERS/Brandon Bell

Teresinha Conceicao receives the Sinovac coronavirus disease (COVID-19) vaccine at Christ the Redeemer statue in Rio de Janeiro, Brazil January 18, 2021. REUTERS/Ricardo Moraes

Soccer Football - Serie A - Cagliari v AC Milan - Sardegna Arena, Cagliari, Italy - January 18, 2021 AC Milan's Zlatan Ibrahimovic and Diogo Dalot celebrate after the match REUTERS/Alberto Lingria

A man sits outside his one-room home as the spread of the coronavirus disease (COVID-19) continues, in Medina neighbourhood, Dakar, Senegal January 18, 2021. REUTERS/Zohra Bensemra

A girl wearing a face mask watches her mother eating outside their one-room house, as the spread of the coronavirus disease (COVID-19) continues, in Medina neighbourhood, Dakar, Senegal January 18, 2021. REUTERS/Zohra Bensemra TPX IMAGES OF THE DAY

Dulcineia da Silva Lopes gestures after receiving the Sinovac coronavirus disease (COVID-19) vaccine at Christ the Redeemer statue in Rio de Janeiro, Brazil January 18, 2021. REUTERS/Ricardo Moraes

Members of "Don't Mute DC" and "Living With The Law" perform as they celebrate MLK Community Service Day in Washington D.C., days ahead of U.S. President-elect Joe Biden's inauguration, U.S. January 18, 2021. REUTERS/Brandon Bell

A man sits outside his one-room home as the spread of the coronavirus disease (COVID-19) continues, in Medina neighbourhood, Dakar, Senegal January 18, 2021. REUTERS/Zohra Bensemra

Children react while playing table football as the spread of the coronavirus disease (COVID-19) continues, in Medina neighbourhood, Dakar, Senegal January 18, 2021. REUTERS/Zohra Bensemra

Members of "Don't Mute DC" and "Living With The Law" perform as they celebrate MLK Community Service Day in Washington D.C., days ahead of U.S. President-elect Joe Biden's inauguration, U.S. January 18, 2021. REUTERS/Brandon Bell

Dulcineia da Silva Lopes receives the Sinovac coronavirus disease (COVID-19) vaccine at Christ the Redeemer statue in Rio de Janeiro, Brazil January 18, 2021. REUTERS/Ricardo Moraes

A boy reacts while playing table football as the spread of the coronavirus disease (COVID-19) continues, in Medina neighbourhood, Dakar, Senegal January 18, 2021. REUTERS/Zohra Bensemra

A girl buys food as the spread of the coronavirus disease (COVID-19) continues, in Medina neighbourhood, Dakar, Senegal January 18, 2021. REUTERS/Zohra Bensemra

A person walks past a mural of Martin Luther King Jr. during the celebration of MLK Community Service Day in Washington D.C., days ahead of U.S. President-elect Joe Biden's inauguration, U.S. January 18, 2021. REUTERS/Brandon Bell

Soccer Football - Serie A - Cagliari v AC Milan - Sardegna Arena, Cagliari, Italy - January 18, 2021 AC Milan coach Stefano Pioli REUTERS/Alberto Lingria

Soccer Football - Serie A - Cagliari v AC Milan - Sardegna Arena, Cagliari, Italy - January 18, 2021 AC Milan coach Stefano Pioli REUTERS/Alberto Lingria

Soccer Football - Serie A - Cagliari v AC Milan - Sardegna Arena, Cagliari, Italy - January 18, 2021 AC Milan coach Stefano Pioli REUTERS/Alberto Lingria

Soccer Football - Serie A - Cagliari v AC Milan - Sardegna Arena, Cagliari, Italy - January 18, 2021 AC Milan's Zlatan Ibrahimovic in action with Cagliari's Diego Godin REUTERS/Alberto Lingria

A street food vendor waits for customers as the spread of the coronavirus disease (COVID-19) continues, in Medina neighbourhood, Dakar, Senegal January 18, 2021. REUTERS/Zohra Bensemra

Children recite the Koran outside their house as the spread of the coronavirus disease (COVID-19) continues, in Medina neighbourhood, Dakar, Senegal January 18, 2021. REUTERS/Zohra Bensemra