ARLINGTON, Va. — More than 200,000 flags are up in Arlington National Cemetery, a solemn reminder that Memorial Day weekend is about sacrifice and remembrance.

For the Old Guard their tradition is meaning, their purpose is honor and their specialty is detail.

“Every time you go up you try to center yourself on whatever the marker is,” one member says. “And then we take a step back, make sure they’re straight and not leaning one way or the other… for every single one.”

PHOTO GALLERY: Soldiers of the 3rd U.S. Infantry Regiment Hosts Annual Flags-In Ceremony at Arlington National Cemetery

They may be exact but these soldiers are men, not machines.

“Sometimes it can get overwhelming, especially when you get to section 60, it’s recent veterans and I have about eight friends that I served with that are there,” one member says. “I take probably a longer time and just remember their sacrifice.”

WNEW D.C. Bureau Chief Kris Ankarlo contributed to this report. Follow him and WNEW on Twitter.