A field of flags is spread across the National Mall, with the Washington Monument in the background, late Tuesday, the eve of the 59th Presidential Inauguration.

The U.S. Capitol is seen between flags placed on the National Mall ahead of the inauguration of President-elect Joe Biden and Vice President-elect Kamala Harris, scheduled for Wednesday.

A worker installs flags on Pennsylvania Avenue in front of the White House ahead of President-elect Joe Biden's inauguration ceremony, on Tuesday in Washington.

Flags are placed on the National Mall ahead of the inauguration. Shortly before Vice President-elect Joe Biden departed for Washington, the U.S. reached another grim milestone in the pandemic, surpassing 400,000 deaths from the virus, according to Johns Hopkins University.

Inaugural organizers on Monday finished installing some 200,000 U.S., state and territorial flags on the National Mall, a display to represent the American people who couldn’t come to the inauguration, which is restricted under the tight security and COVID restrictions.

State flags including the Tennessee state flag, in front, are placed on the National Mall on Monday. Aides say President-elect Joe Biden will use Wednesday's inaugural address to call for American unity and offer an optimistic message that Americans can get past the dark moment by working together.

Lights surround the Lincoln Memorial Reflecting Pool, placed as a memorial to COVID-19 victims Tuesday, with the U.S. Capitol in the background.

Nurse Lori Marie Key sings 'Amazing Grace' during the COVID-19 memorial Tuesday evening in Washington.

President-elect Joe Biden speaks during Tuesday's COVID-19 memorial, before lights placed around the Lincoln Memorial Reflecting Pool.

Vice President-elect Kamala Harris speaks during the COVID-19 memorial Tuesday in Washington.

With the Washington Monument in the background, President-elect Joe Biden stands with his wife, Jill Biden, and Vice President-elect Kamala Harris stands with her husband, Doug Emhoff, as they look at lights placed around the Lincoln Memorial Reflecting Pool during a COVID-19 memorial on Tuesday in Washington.