Over 1,000 service members were out at sunrise at Arlington National Cemetery on Thursday for the annual "Flags In" to honor the nation's fallen military heroes ahead of Memorial Day.

A soldier from the U.S. Army's "Old Guard," the 3rd U.S. Infantry Regiment, places American flags in front of more than 228,000 headstones in Arlington National Cemetery, May 23, 2019.

More than 1,500 soldiers from The Old Guard placed American flags at more than 260,000 headstones at Arlington National Cemetery early Thursday morning, ahead of Memorial Day.

On Memorial Day, each gravesite of the more than 260,000 U.S. service members buried at Arlington National Cemetery will have a small American flag carefully positioned exactly one boot's length ...

Members of the 3rd U.S. Infantry Regiment place flags at the headstones of U.S. military personnel buried at Arlington National Cemetery, in preparation for Memorial Day, on May 25, 2023, in ...

The yearly tradition at Arlington National Cemetery takes about four hours — placing a small American flag exactly one boot-length from each of the 260,000 headstones. Early Thursday morning ...

Members of the 3rd U.S. Infantry Regiment place flags at the headstones of U.S. military personnel buried at Arlington National Cemetery, in preparation for Memorial Day, on May 25, 2023, in ...

More than 1,500 soldiers from The Old Guard placed American flags at more than 260,000 headstones at Arlington National Cemetery early Thursday morning, ahead of Memorial Day.