PLEASE NOTE: THIS EDIT CONTAINS 4:3 MATERIAL<br/> <br />Thousands of white grave markers glimmer along the hillside at Arlington National Cemetery across from the nation's capitol, a sobering reminder of the human cost of war. It is the final resting place of more than 400,000 servicemen and women.<br/> <br />United States Marine Corps Col. Todd Hixson is one of those veterans interred. Hixson, a 27-year veteran of the Corps, died in October 2009, committing suicide just three months after he returned from deployment in Iraq.<br/> <br />For his widow, Denise Coutlakis, dealing with not only Hixson's death, but his choice to take his own life, was something she is still coming to terms with.<br/> <br />(SOUNDBITE) Denise Coutlakis, saying (English):<br/> <br />"There's always that nagging sense that it shouldn't have gone this way, it could have not gone this way."<br/> <br />The statistics on veterans, mental health and suicide are striking. Nearly 1 in 5 have been diagnosed with post-traumatic stress disorder (PTS
