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.

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 ...

This Memorial Day, more than 250,000 American flags will be planted at the military graves at Arlington National Cemetery. An American flag will be planted at each of the more than 250,000 ...

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.