A bird takes flight as the sun rises over Arlington National Cemetery in section 60 on Thursday, May 22, 2014 in Arlington, VA. Hundreds of Iraq and Afghanistan war dead are buried in the section. (Photo by Amanda Voisard/For the Washington Post)
According to the Department of Veterans Affairs, 10 to 18 percent of Iraq and Afghanistan war veterans may have post-traumatic stress disorder. The sleeplessness, anger, anxiety and sense of isolation that can accompany PTSD pose tremendous challenges for veterans and their families.