![Flags In At Arlington National Cemetery Old Guard Arlington National Cemetery](https://api.time.com/wp-content/uploads/2014/06/arlington-cemetery-150-anniversary-6.jpg?quality=85&w=2400)
By TIME Photo
![Wreath Ceremony Commemorates JFK's Founding Of Green Berets Old Guard Arlington National Cemetery](https://api.time.com/wp-content/uploads/2014/06/arlington-cemetery-150-anniversary-1.jpg?quality=75&w=2400)
![US Army soldiers walk their posts 13 May at the To Old Guard Arlington National Cemetery](https://api.time.com/wp-content/uploads/2014/06/arlington-cemetery-150-anniversary-2.jpg?quality=75&w=2400)
![As dawn breaks, Tomb of the Unknowns Sentinel Sgt. Old Guard Arlington National Cemetery](https://api.time.com/wp-content/uploads/2014/06/arlington-cemetery-150-anniversary-3.jpg?quality=75&w=2400)
![U.S. Army Specialist Brian Murphy places U. S. fla Old Guard Arlington National Cemetery](https://api.time.com/wp-content/uploads/2014/06/arlington-cemetery-150-anniversary-4.jpg?quality=75&w=2400)
![Arlington Cemetery Old Guard Arlington National Cemetery](https://api.time.com/wp-content/uploads/2014/06/arlington-cemetery-150-anniversary-18.jpg?quality=75&w=2400)
![Arlington Cemetery Is Decorated With 250,000 Flags Ahead Of Memorial Day Old Guard Arlington National Cemetery](https://api.time.com/wp-content/uploads/2014/06/arlington-cemetery-150-anniversary-5.jpg?quality=75&w=2400)
![Flags In At Arlington National Cemetery Old Guard Arlington National Cemetery](https://api.time.com/wp-content/uploads/2014/06/arlington-cemetery-150-anniversary-6.jpg?quality=75&w=2400)
![French President Hollande Lays Wreath at Tomb of Unknown Soldier Old Guard Arlington National Cemetery](https://api.time.com/wp-content/uploads/2014/06/arlington-cemetery-150-anniversary-7.jpg?quality=75&w=2400)
![Old Guard Training at Fort Meyers Old Guard Arlington National Cemetery](https://api.time.com/wp-content/uploads/2014/06/arlington-cemetery-150-anniversary-8.jpg?quality=75&w=2400)
![Arlington Nat'l Cemetery Burial Service For WWII Solider Old Guard Arlington National Cemetery](https://api.time.com/wp-content/uploads/2014/06/arlington-cemetery-150-anniversary-9.jpg?quality=75&w=2400)
![Burial service for U.S. Army Lt. Col. Don Carlos Faith Jr., a Medal of Honor recipient missing from Korean War Old Guard Arlington National Cemetery](https://api.time.com/wp-content/uploads/2014/06/arlington-cemetery-150-anniversary-10.jpg?quality=75&w=2400)
![Army Marks Its 238th Birthday With Wreath Laying Ceremony At Arlington Nat'l Cemetery Old Guard Arlington National Cemetery](https://api.time.com/wp-content/uploads/2014/06/arlington-cemetery-150-anniversary-11.jpg?quality=75&w=2400)
![Arlington Nat'l Cemetery Holds Wreath Laying Ceremony Commemorating 50th Anniversary Of JFK's Death Old Guard Arlington National Cemetery](https://api.time.com/wp-content/uploads/2014/06/arlington-cemetery-150-anniversary-12.jpg?quality=75&w=2400)
![More Snow Falls On Washington, D.C. Area Old Guard Arlington National Cemetery](https://api.time.com/wp-content/uploads/2014/06/arlington-cemetery-150-anniversary-13.jpg?quality=75&w=2400)
![a private walks amongst the headstones planting flags in Arlington National Cemetery on memorial day weekend 1995. Old Guard Arlington National Cemetery](https://api.time.com/wp-content/uploads/2014/06/arlington-cemetery-150-anniversary-14.jpg?quality=75&w=2400)
![Caisson Team Fulfills Somber Role At Arlington National Cemetery Old Guard Arlington National Cemetery](https://api.time.com/wp-content/uploads/2014/06/arlington-cemetery-150-anniversary-15.jpg?quality=75&w=2400)
![Burial service for U.S. Army Captain Brian M. Bunting at Arlington National Cemetery Old Guard Arlington National Cemetery](https://api.time.com/wp-content/uploads/2014/06/arlington-cemetery-150-anniversary-16.jpg?quality=75&w=2400)
![Member of the Third U.S. Infantry Regiment salutes in front of a grave during a "Flags-In" ceremony at Arlington National Cemetery in Washington Old Guard Arlington National Cemetery](https://api.time.com/wp-content/uploads/2014/06/arlington-cemetery-150-anniversary-17.jpg?quality=75&w=2400)
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