Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, walks through Section 60 at Arlington National Cemetery in Arlington, Va., earlier this month. He is focusing on the problem of military suicides. (Associated Press)

Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, walks through Section 60 at Arlington National Cemetery in Arlington, Va., earlier this month. He is focusing on the problem of military suicides. (Associated Press)