Discuss as:

Mementos left at Arlington show toll on loved ones of those lost in Iraq and Afghanistan

Kevin Lamarque / Reuters

Section 60 of Arlington National Cemetery in Virginia, contains graves of soldiers from the wars in Iraq and Afghanistan, March 13.

Kevin Lamarque / Reuters

Celeste Mills of El Paso, Texas, kneels beside the grave of her youngest son, Joshua Mills, who was killed in Afghanistan, at Arlington National Cemetery in Virginia, March 13.

Related:

Family grieves for soldier who died after six tours of duty

Iraq war costs U.S. more than $2 trillion: study

Military coverage on NBCNews.com