Volunteers for Wreaths Across America line up at a truck to receive wreaths to place at headstones, Dec. 13, at Arlington National Cemetery. The mission of Wreaths Across America is to remember fallen heroes, honor those who serve, and teach children about the many sacrifices made by veterans and their families. Each year, thousands of volunteers from all over the country participate in wreath laying events at Arlington National Cemetery and nation wide. (U.S. Army Photo by 1st Lt. Isra Pananon/released)