KEILAR: President Obama marking this Memorial Day as the first in 14 years that the U.S. is not engaged in a major ground war. At Arlington National Cemetery, the president placed a wreath at the Tomb of the Unknown Soldier. And he paid tribute to those who they've their lives for the nation.</s>BARACK OBAMA, PRESIDENT OF THE UNITED STATES: The values that drive our brave men and women in uniform remain constant, honor, courage, selflessness. Those values lived in the hearts of everyday heroes who risked everything for us in every American war, men and women who now rest forever in these quiet fields and across our land.</s>KEILAR: For this Memorial Day, more than 228,000 flags are placed at grave sites at Arlington National Cemetery. It's a job carried out by the 3rd U.S. Infantry Regiment.</s>KEILAR: I'm Brianna Keilar here in Washington. For our international viewers, "Amanpour" is next. And for our viewers in North America, "Newsroom" with Brooke Baldwin starts right now.</s>BROOKE BALDWIN, CNN ANCHOR: You're watching CNN. I'm Brooke Baldwin. Thank you so much for being with me.
Obama Pays Tribute to Soldiers at Arlington.