US military suicides on the rise
12 July 2012 Last updated at 23:31 BST
Suicide rates in the US military have reached their highest point since the beginning of the Afghanistan war, with about one death per day.
Those numbers are rising, despite the Pentagon spending $2bn (£1.3bn) per year on mental health.
Time magazine's international editor Jim Frederick spoke to the BBC's Rajesh Mirchandani about what US Defence Secretary Leon Panetta called his "most frustrating challenge".
Mr Frederick said that the most troubling aspect was that "no-one knows why this is happening".