A U.S. band takes part in a wreath laying ceremony in honor of the veterans in front of the Tomb of the Unknowns at Arlington National Cemetery outside Washington D.C., capital of the United States, Nov. 11, 2012. (Xinhua/Fang Zhe)
Two soldiers walk at the Tomb of the Unknowns at Arlington National Cemetery outside Washington D.C., capital of the United States, Nov. 11, 2012. A wreath laying ceremony in honor of the veterans was held in Arlington National Cemetery on Sunday. (Xinhua/Fang Zhe)
A U.S. veteran takes part in a wreath laying ceremony in honor of the veterans in front of the Tomb of the Unknowns at Arlington National Cemetery outside Washington D.C., capital of the United States, Nov. 11, 2012. (Xinhua/Fang Zhe)
U.S. President Barack Obama takes part in a wreath laying ceremony in honor of the veterans in front of the Tomb of the Unknowns at Arlington National Cemetery outside Washington D.C., capital of the United States, Nov. 11, 2012. (Xinhua/Fang Zhe)
U.S. President Barack Obama takes part in a wreath laying ceremony in honor of the veterans in front of the Tomb of the Unknowns at Arlington National Cemetery outside Washington D.C., capital of the United States, Nov. 11, 2012. (Xinhua/Fang Zhe)