US marks Memorial Day
A solider from the 3rd US Infantry Regiment places flags at grave sites during the "Flags-In" ceremony at the Arlington National Cemetery in Arlington, Virginia, the , on May 26, 2016. More than 1,000 soldiers placed flags for over 223,000 graves in the cemetery to mark Memorial Day, the last Monday of May. (Xinhua/Yin Bogu)
A solider from the 3rd US Infantry Regiment places flags at grave sites during the "Flags-In" ceremony at the Arlington National Cemetery in Arlington, Virginia, the United States, on May 26, 2016. More than 1,000 soldiers placed flags for over 223,000 graves in the cemetery to mark Memorial Day, the last Monday of May. (Xinhua/Yin Bogu)
Soliders from the 3rd US Infantry Regiment walk to place flags at grave sites during the "Flags-In" ceremony at the Arlington National Cemetery in Arlington, Virginia, the United States, on May 26, 2016. More than 1,000 soldiers placed flags for over 223,000 graves in the cemetery to mark Memorial Day, the last Monday of May. (Xinhua/Yin Bogu) 
Soliders from the 3rd US Infantry Regiment walk to place flags at grave sites during the "Flags-In" ceremony at the Arlington National Cemetery in Arlington, Virginia, the United States, on May 26, 2016. More than 1,000 soldiers placed flags for over 223,000 graves in the cemetery to mark Memorial Day, the last Monday of May. (Xinhua/Yin Bogu)
A solider from the 3rd US Infantry Regiment places flags at grave sites during the "Flags-In" ceremony at the Arlington National Cemetery in Arlington, Virginia, the United States, on May 26, 2016. More than 1,000 soldiers placed flags for over 223,000 graves in the cemetery to mark Memorial Day, the last Monday of May. (Xinhua/Yin Bogu)
A solider from the 3rd US Infantry Regiment places flags at grave sites during the "Flags-In" ceremony at the Arlington National Cemetery in Arlington, Virginia, the United States, on May 26, 2016. More than 1,000 soldiers placed flags for over 223,000 graves in the cemetery to mark Memorial Day, the last Monday of May. (Xinhua/Yin Bogu)
A solider from the 3rd US Infantry Regiment places flags at grave sites during the "Flags-In" ceremony at the Arlington National Cemetery in Arlington, Virginia, the United States, on May 26, 2016. More than 1,000 soldiers placed flags for over 223,000 graves in the cemetery to mark Memorial Day, the last Monday of May. (Xinhua/Yin Bogu)
A solider from the 3rd US Infantry Regiment places flags at grave sites during the "Flags-In" ceremony at the Arlington National Cemetery in Arlington, Virginia, the United States, on May 26, 2016. More than 1,000 soldiers placed flags for over 223,000 graves in the cemetery to mark Memorial Day, the last Monday of May. (Xinhua/Yin Bogu)