President Barack Obama on Monday paid tribute to those who have served in the nation’s military, including one of the nation’s oldest veterans, 107-year-old Richard Overton.

“This is the life of one American veteran, living proud and strong in the land he helped keep free,” Obama said during a ceremony at Arlington National Cemetery.

Overton was among those in the audience for the outdoor ceremony on a crisp, sun-splashed Veteran’s Day. Earlier Monday, Overton and other veterans attended a breakfast at the White House.

Obama used his remarks Monday to remind the nation that thousands of service members are still at war in Afghanistan. The war is expected to formally conclude at the end of next year, though the U.S. may keep a small footprint in the country.

As the Afghan war comes to a close, Obama said the nation has a responsibility to ensure that the returning troops are the “best cared-for and best respected veterans in the world.” The country’s obligations to those who served “endure long after the battle ends,” he said.

(AP)