Photos: America Honors Its Veterans In Somber Ceremonies

ACROSS AMERICA — Troops marching in a full honors procession dressed in World War 1-era uniforms participated in a procession to mark the 100th anniversary of the World War 1 Tomb of the Unknown Soldier during Veterans Day in Arlington, Virginia.

For the first time in 100 years, the Tomb of the Unknown Soldier plaza was open to the public. Members of the public placed flowers at the tomb to mark the event as a somber tribute to those who were lost in combat — and never recovered.

A military flyover, military processions and flowers laid near the tomb were all part of this year's Veterans Day.

A tomb guard of the 3rd U.S. Infantry Regiment, known as "The Old Guard," salutes before a centennial ceremony at the Tomb of the Unknown Soldier in Arlington National Cemetery in Arlington, Virginia, Wednesday. The Tomb of the Unknown Soldier, serving as the heart of Arlington National Cemetery, has been the final resting place for one of America's unidentified World War I service members, and unidentified soldiers from later wars were added in 1958 and 1984. The tomb plaza is open to the public this week for the first time in almost 100 years.

President Joe Biden speaks in the Memorial Amphitheater, in Arlington National Cemetery, on Veterans Day in Arlington, Va.

Troops march during a full honors procession commemorating the 100th anniversary of the Tomb of the Unknown Soldier on at Arlington National Cemetery.

U.S. troops march during a joint full honors procession evoking the original 1921 funeral procession of a World War I unknown soldier, in commemoration of the 100th anniversary of the Tomb of the Unknown Soldier on Veterans Day in Arlington National Cemetery.

The shadow of a soldier with the 3rd U.S. Infantry Regiment, known as "The Old Guard," is seen as he moves flowers during a centennial commemoration event at the Tomb of the Unknown Soldier in Arlington National Cemetery.

Troops march during a full honors procession commemorating the 100th anniversary of the Tomb of the Unknown Soldier at Arlington National Cemetery.

Darrell Bush, 96 (left), a former U.S. Army staff sergeant from Camp Springs, Maryland, and a World War II veteran of the Battle of the Bulge, salutes after placing a flower during a centennial commemoration event at the Tomb of the Unknown Soldier in Arlington National Cemetery on Veterans Day.

People place flowers during a centennial commemoration event at the Tomb of the Unknown Soldier in Arlington National Cemetery.

A U.S. sailor holds onto an American flag amid graves on Veterans Day in Arlington National Cemetery on Veterans Day.

A member of the U.S. Army Brass Quintet performs 'Taps' during a Veterans Day ceremony at the World War II Memorial.

World War II Navy veteran Senior Chief Petty Officer Remigio Cabacar smiles as he attends a Veterans Day ceremony at the World War II Memorial.

A full military honors procession honoring the centennial anniversary of the Tomb of the Unknown Soldier takes place at Arlington National Cemetery on Veterans Day to mark the 100th anniversary of the Tomb of the Unknown Soldier the sacred plaza of the memorial is being open to the public this week.