On the president's first day in office, he announced his administration's plan to battle the novel coronavirus.

President Joe Biden signed executive actions on establishing a testing board, extending mask mandates on some forms of transportation and requiring travelers to the U.S. to test negative.

The president plans to sign at least 10 executive orders designed to tackle the pandemic.

Civil rights groups are celebrating President Joe Biden's swift revocation of a Trump administration order that had banned federal agencies, contractors and recipients of federal funding from conducting certain diversity training

Former CIA Station Chief Darrell Blocker discusses the impact President Joe Biden will have on the intelligence community as he starts his presidency.

President Joe Biden is drawing a sharp contrast with former President Trump, aiming to set a tone of truthfulness and respect.

World leaders have breathed an audible sigh of relief that the United States under President Joe Biden is rejoining the global effort to curb climate change, a cause that his predecessor had shunned

From Katy Perry to Lin-Manuel Miranda, stars and Americans around the country join President Joe BIden’s message of unity on inauguration night.

Amanda Gorman read her poem, "The Hill We Climb," at the Biden-Harris ceremony.

The crew reacts to President Biden’s inauguration speech — particularly his goal to unite the country and whether it will be successful — and looks at the policy agenda for his first week in office.

President-elect Joe Biden is inheriting a pandemic that the United States is leading the world in for all the wrong reasons.

When President-elect Joe Biden takes the oath of office Wednesday, he'll do so using a Bible with 127 years of family history behind it.

In an inauguration ceremony that was without the traditional large crowds due to the coronavirus pandemic, Biden took the oath of office and delivered a hopeful inaugural address focused on unity.

From no homework and flying cars to an end to COVID-19, children across the country reveal what they’d like to see in the next four years.

The first family brought their beloved dogs, Champ and Major, with them to the White House.

On his first day, President Joe Biden signed multiple executive orders, including rejoining the Paris Climate agreement, and reversing former President Donald Trump’s travel ban.

Amanda Gorman, 22, is the youngest poet in recent history to read at an inauguration.

The new president did not waste time before signing executive orders addressing the coronavirus pandemic, the economic crisis and the climate crisis, among others.

European leaders, the U.K., Russia and Iran have all reacted to inauguration day.

The 22-year-old read her own poem, titled “The Hill We Climb,” at the inauguration of President Joe Biden and Vice President Kamala Harris.

As President Joe Biden gave his inauguration address, an unidentified man honored his late son Beau Biden in Greenville, Delaware, until the president finished speaking.

Joe Biden was sworn in minutes after Kamala Harris became the first female, Black and South Asian vice president in a ceremony marked by messages of hope and healing and star performances.

President Joe Biden is entering the White House at a time of deep division among Americans and record deaths from the coronavirus. ABC News contributors discuss where we go from here.

Stars ranging from Lady Gaga to Bruce Springsteen have capped a star-studded inauguration for President Joe Biden and Vice President Kamala Harris

A look at the historic inauguration of Joe Biden and Vice President Kamala Harris

Sirius XM’s Mike Muse talks J. Lo and Lady Gaga’s performances at the inauguration ceremony and Amanda Gorman, who made history as the youngest inaugural poet.

President Joe Biden delivered an inaugural address calling for unity in America. Vice President Kamala Harris becomes the highest-ranking woman in U.S. history.

President Joe Biden and Vice President Kamala Harris were sworn into office on Jan. 20, 2021.

Psaki, press secretary for the Biden administration, takes questions during the daily press briefing after the previous administration largely stopped briefings.

Byron Pitts, Terry Moran, Yvette Simpson, David Muir, Linsey Davis, Chris Christie, Rahm Emanuel and Sara Fagen discuss the inauguration events.

Angella Reid, former White House chief usher, explains what the changing of administrations actually looks like from inside the White House.

Newly inaugurated President Joe Biden kept his promise by signing actions to rejoin the Paris climate accord, end the so-called “Muslim travel ban” and require masks on federal property.

Inauguration co-chair, Delaware Rep. Lisa Blunt Rochester, talks about the smooth day, President Joe Biden’s calls for unity and the path forward for the new administration.

ABC News correspondents discuss the Biden administration's first issues that will be addressed in the coming days.

A sign at New York City’s 46th Street subway station was changed to “46th Joe” in tribute to the newly inaugurated Joe Biden, the 46th president.

The ceremony that made Joe Biden as the 46th president of the United States was an inauguration like never before.

Keke Palmer will host the first-ever Inauguration Day program for kids.

The Democratic Texas congresswoman, who has been to seven inaugurations over the years, discusses why the ceremony for President Joe Biden and Vice President Kamala Harris was historic.

President Joe Biden signed his first executive orders on the COVID-19 pandemic, immigration and climate change.

Lady Gaga stunned in a custom Schiaparelli Haute Couture ball gown for Biden-Harris Inauguration.

President Joseph R. Biden Jr. made his way to the Oval Office to sign his first executive order with his family by his side.

Retired Gen. Colin Powell, who served with Democratic and Republican administrations, remarks on President Joe Biden’s inauguration.

Biden became the 46th president of the United States Wednesday.

Biden gave his first speech as the 46th president of the United States.

Chairman of the Joint Congressional Committee on Inaugural Ceremonies, Sen. Roy Blunt comments on the inauguration ceremony.

Newly inaugurated President Joe Biden and former presidents lay a wreath at the Tomb of the Unknown Soldier.

Garth Brooks performed "Amazing Grace" at the inauguration of President Joe Biden and Vice President Kamala Harris.

The inauguration of Joe Biden is unlike any other -- marked by a global pandemic, heightened security , and an outgoing president who has done away with most traditions.

A stillness prevailed in Washington that belied the challenges that face the nation and its new president at this moment.

Andrea Hall, the first Black woman to serve as fire captain for the South Fulton Fire Department, spoke and signed the Pledge of Allegiance.