Just before Memorial Day weekend, the 3rd U.S. Infantry Regiment (the "Old Guard") honors America's fallen heroes by placing American flags at gravesites for service members buried at Arlington National Cemetery and the U.S. Soldiers' and Airmen's Home National Cemetery.
This tradition, known as "Flags In," has taken place annually since the Old Guard was designated as the Army's official ceremonial unit in 1948. Every available soldier in the 3rd U.S. Infantry Regiment participates, placing small American flags in front of more than 228,000 headstones and at the bottom of about 7,000 niche rows in the cemetery's Columbarium Courts and Niche Wall. Each flag is inserted into the ground, exactly one boot length from the headstone's base.
At the Tomb of the Unknown Soldier, the Sentinels (who are members of the Old Guard) place flags to honor the Unknowns. Army chaplains place flags in front of the headstones and four memorials located on Chaplains' Hill in Section 2.
All flags are removed after Memorial Day, before the cemetery opens to the public.
See photos from Flags In 2019.