Scores of Americans gathered Sunday in Pennsylvania, New York and Virginia to remember the victims of the September 11 terrorist attacks.
President Joe Biden participated in a wreath-laying ceremony outside the Pentagon, where American Airlines Flight 77 crashed in 2001, saying it was a day of renewal and resolve for each and every American.
At the 9/11 Memorial in Lower Manhattan, where 2,750 people were killed after two planes were flown into the World Trade Center, members of the New York Fire Department raised a flag to honor the victims.
On Sunday, First Lady Biden visited the site of the crash of United Airlines Flight 93 and said it was a monument to the memories that live on each day.
The late Queen Elizabeth II was quoted by Biden in his speech at the Pentagon memorial site. He hoped that we would remember that we cared for each other and came together.
A month ago, Biden authorized a drone strike in the Afghan capital of Kabul that killed al-Qaeda leader Ayman al-Zawahiri, an Egyptian eye surgeon who was the group's second-in-command at the time of the September 11 attacks. After Osama bin Laden was killed, al-Zawahiri took over. More than a year has passed since the end of the US's war in Afghanistan, which began with the September 11 attacks and ended with the fall of the Taliban. The chaotic withdrawal sparked a backlash from both Republicans and Democrats, with thousands still stuck in the Taliban run country hoping to escape, but Biden has argued the war accomplished its primary goals years ago. Afghanistan is over, but our commitment to preventing another attack against the U.S. is not, according to Biden.
This is a day to remember, but also a day of renewal and resolve according to Biden.
The US marks the 21st anniversary of 9/11.