Excavations are carried out by University of Oklahoma in hopes of finding remains from the Tulsa 1921 massacre during the 100th anniversary of the Massacre in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Lawrence Bryant

Reverend Jesse Jackson greets a little girl in the crowd during the 100th anniversary of the 1921 Tulsa Massacre in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Lawrence Bryant

U.S. President Joe Biden delivers remarks on the centennial anniversary of the Tulsa race massacre during a visit to the Greenwood Cultural Center in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Carlos Barria

U.S. President Joe Biden gestures as he delivers remarks on the centennial anniversary of the Tulsa race massacre during a visit to the Greenwood Cultural Center in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Carlos Barria

U.S. President Joe Biden delivers remarks on the centennial anniversary of the Tulsa race massacre during a visit to the Greenwood Cultural Center in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Carlos Barria

U.S. President Joe Biden delivers remarks on the centennial anniversary of the Tulsa race massacre during a visit to the Greenwood Cultural Center in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Carlos Barria

Survivors and siblings Viola Fletcher and Hughes Van Ellis listen as U.S. President Joe Biden delivers remarks on the centennial anniversary of the Tulsa race massacre during a visit to the Greenwood Cultural Center in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Carlos Barria

A guest looks on as U.S. President Joe Biden delivers remarks on the centennial anniversary of the Tulsa race massacre during a visit to the Greenwood Cultural Center in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Carlos Barria TPX IMAGES OF THE DAY

U.S. President Joe Biden delivers remarks on the centennial anniversary of the Tulsa race massacre during a visit to the Greenwood Cultural Center in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Carlos Barria

Viola Fletcher, 107, the oldest known living survivor of the Tulsa race massacre listens as U.S. President Joe Biden delivers remarks on the centennial anniversary during a visit to the Greenwood Cultural Center in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Carlos Barria

A guest looks on as U.S. President Joe Biden delivers remarks on the centennial anniversary of the Tulsa race massacre during a visit to the Greenwood Cultural Center in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Carlos Barria

Survivors and siblings Viola Fletcher and Hughes Van Ellis listen as U.S. President Joe Biden delivers remarks on the centennial anniversary of the Tulsa race massacre during a visit to the Greenwood Cultural Center in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Carlos Barria

Survivors and siblings Viola Fletcher and Hughes Van Ellis listen as U.S. President Joe Biden delivers remarks on the centennial anniversary of the Tulsa race massacre during a visit to the Greenwood Cultural Center in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Carlos Barria

Survivors and siblings Viola Fletcher and Hughes Van Ellis listen as U.S. President Joe Biden delivers remarks on the centennial anniversary of the Tulsa race massacre during a visit to the Greenwood Cultural Center in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Carlos Barria

U.S. President Joe Biden delivers remarks on the centennial anniversary of the Tulsa race massacre during a visit to the Greenwood Cultural Center in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Carlos Barria

A man watches U.S. President Joe Biden speak on his smartphone as he visits to mark the 100th anniversary of the 1921 Tulsa Massacre in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Lawrence Bryant

A woman watches U.S. President Joe Biden speak on her smartphone as he visits to mark the 100th anniversary of the 1921 Tulsa Massacre in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Lawrence Bryant

A girl looks out of the crowd hoping to see U.S. President Joe Biden as he visits to mark the 100th anniversary of the 1921 Tulsa Massacre in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Lawrence Bryant

People gather as U.S. President Joe Biden tours the Greenwood Cultural Center during a visit to mark the centennial anniversary of the 1921 Tulsa race massacre in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Carlos Barria

U.S. President Joe Biden tours the Greenwood Cultural Center during a visit to mark the centennial anniversary of the 1921 Tulsa race massacre in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Carlos Barria

U.S. President Joe Biden tours the Greenwood Cultural Center during a visit to mark the centennial anniversary of the 1921 Tulsa race massacre in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Carlos Barria

U.S. President Joe Biden tours the Greenwood Cultural Center during a visit to mark the centennial anniversary of the 1921 Tulsa race massacre in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Carlos Barria

U.S. President Joe Biden tours the Greenwood Cultural Center during a visit to mark the centennial anniversary of the 1921 Tulsa race massacre in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Carlos Barria

U.S. President Joe Biden tours the Greenwood Cultural Center during a visit to mark the centennial anniversary of the 1921 Tulsa race massacre in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Carlos Barria

U.S. President Joe Biden tours the Greenwood Cultural Center during a visit to mark the centennial anniversary of the 1921 Tulsa race massacre in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Carlos Barria

U.S. President Joe Biden tours the Greenwood Cultural Center during a visit to mark the centennial anniversary of the 1921 Tulsa race massacre in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Carlos Barria

U.S. President Joe Biden tours the Greenwood Cultural Center during a visit to mark the centennial anniversary of the 1921 Tulsa race massacre in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Carlos Barria

U.S. President Joe Biden arrives at Tulsa International Airport on a visit to mark the centennial anniversary of the 1921 Tulsa race massacre in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Carlos Barria

U.S. President Joe Biden and HUD Secretary Marcia L. Fudge arrive at Tulsa International Airport on a visit to mark the centennial anniversary of the 1921 Tulsa race massacre in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Carlos Barria

U.S. President Joe Biden arrives at Tulsa International Airport on a visit to mark the centennial anniversary of the 1921 Tulsa race massacre in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Carlos Barria

U.S. President Joe Biden and HUD Secretary Marcia L. Fudge arrive at Tulsa International Airport on a visit to mark the centennial anniversary of the 1921 Tulsa race massacre in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Carlos Barria

U.S. President Joe Biden and HUD Secretary Marcia L. Fudge arrive at Tulsa International Airport on a visit to mark the centennial anniversary of the 1921 Tulsa race massacre in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Carlos Barria

U.S. President Joe Biden arrives at Tulsa International Airport on a visit to mark the centennial anniversary of the 1921 Tulsa race massacre in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Carlos Barria

U.S. President Joe Biden arrives at Tulsa International Airport on a visit to mark the centennial anniversary of the 1921 Tulsa race massacre in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Carlos Barria

People gather ahead of U.S. President Joe Biden's visit to mark the 100th anniversary of the 1921 Tulsa Massacre, at Vernon AME Church in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Lawrence Bryant

People gather ahead of U.S. President Joe Biden's visit to mark the 100th anniversary of the 1921 Tulsa Massacre, at Greenwood Ave in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Lawrence Bryant

People gather ahead of U.S. President Joe Biden's visit to mark the 100th anniversary of the 1921 Tulsa Massacre, at Greenwood Ave in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Lawrence Bryant

Excavation works are performed to find remains of the 1921 Tulsa Massacre, at Oaklawn Cemetery in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Lawrence Bryant

Excavation works are performed to find remains of the 1921 Tulsa Massacre, at Oaklawn Cemetery in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Lawrence Bryant

Police officers gather ahead of U.S. President Joe Biden's visit to Black Wall Street to mark the 100th anniversary of the 1921 Tulsa Massacre in Tulsa, Oklahoma, U.S., June 1, 2021. REUTERS/Lawrence Bryant

A man holds a candle as he takes part in a vigil to mark the 100th anniversary of the 1921 Tulsa Massacre in Tulsa, Oklahoma, U.S., May 31, 2021. REUTERS/Lawrence Bryant

People take part in a candle vigil to mark the 100th anniversary of the 1921 Tulsa Massacre in Tulsa, Oklahoma, U.S., May 31, 2021. REUTERS/Lawrence Bryant

People take part in a candle vigil to mark the 100th anniversary of the 1921 Tulsa Massacre in Tulsa, Oklahoma, U.S., May 31, 2021. REUTERS/Lawrence Bryant

A woman holds a candle as she takes part in a vigil to mark the 100th anniversary of the 1921 Tulsa Massacre in Tulsa, Oklahoma, U.S., May 31, 2021. REUTERS/Lawrence Bryant

People take part in a candle vigil to mark the 100th anniversary of the 1921 Tulsa Massacre in Tulsa, Oklahoma, U.S., May 31, 2021. REUTERS/Lawrence Bryant

A person holds a candle as she takes part in a vigil to mark the 100th anniversary of the 1921 Tulsa Massacre in Tulsa, Oklahoma, U.S., May 31, 2021. REUTERS/Lawrence Bryant

A jar of soil is put down during a dedication at Stone Hill on the 100 year anniversary of the 1921 Tulsa Massacre in Tulsa, Oklahoma, U.S., May 31, 2021. REUTERS/Lawrence Bryant

Survivors and siblings Viola Fletcher and Hughes Van Ellis attend the soil dedication at Stone Hill on the 100 year anniversary of the 1921 Tulsa Massacre in Tulsa, Oklahoma, U.S., May 31, 2021. REUTERS/Lawrence Bryant

Survivors and siblings Viola Fletcher and Hughes Van Ellis attend the soil dedication at Stone Hill on the 100 year anniversary of the 1921 Tulsa Massacre in Tulsa, Oklahoma, U.S., May 31, 2021. REUTERS/Lawrence Bryant

People attend the soil dedication at Stone Hill on the 100 year anniversary of the 1921 Tulsa Massacre in Tulsa, Oklahoma, U.S., May 31, 2021. REUTERS/Lawrence Bryant

Survivor Viola Fletcher attends the soil dedication at Stone Hill on the 100 year anniversary of the 1921 Tulsa Massacre in Tulsa, Oklahoma, U.S., May 31, 2021. REUTERS/Lawrence Bryant

People attend the soil dedication at Stone Hill on the 100 year anniversary of the 1921 Tulsa Massacre in Tulsa, Oklahoma, U.S., May 31, 2021. REUTERS/Lawrence Bryant

Survivors and siblings Viola Fletcher and Hughes Van Ellis attend the soil dedication at Stone Hill on the 100 year anniversary of the 1921 Tulsa Massacre in Tulsa, Oklahoma, U.S., May 31, 2021. REUTERS/Lawrence Bryant

Survivor Uncle Redd approaches the soil dedication at Stone Hill on the 100 year anniversary of the 1921 Tulsa Massacre in Tulsa, Oklahoma, U.S., May 31, 2021. REUTERS/Lawrence Bryant

Survivor Mother Fletcher attends the soil dedication at Stone Hill on the 100 year anniversary of the 1921 Tulsa Massacre in Tulsa, Oklahoma, U.S., May 31, 2021. REUTERS/Lawrence Bryant

U.S. Congresswoman Maxine Waters looks at Black Wall Street Art during festivities for the 100 year anniversary of the 1921 Tulsa Massacre in Tulsa, Oklahoma, U.S., May 30, 2021. REUTERS/Lawrence Bryant

Attorney Malik Shabazz walk with members of the Black Panthers during festivities for the 100 year anniversary of the 1921 Tulsa Massacre in Tulsa, Oklahoma, U.S., May 30, 2021. REUTERS/Lawrence Bryant

People read a historic marker during festivities for the 100 year anniversary of the 1921 Tulsa Massacre in Tulsa, Oklahoma, U.S., May 30, 2021. REUTERS/Lawrence Bryant

An altar and chairs, which were located in the basement of the original Vernon AME Church and the only part of the building to survive the 1921 Tulsa Massacre, sit in an empty prayer room in Vernon AME Church in Tulsa, Oklahoma, U.S., May 30, 2021. REUTERS/Lawrence Bryant