Minds are terrible things to waste in the US military

It sounds like the punch line of a joke: The person who went crazy was the psychiatrist.

But nobody was laughing on Friday as the US military struggled to cope with the worst mass shooting in its history.

We may never know why Nidal Malik Hasan took aim and fired at his fellow soldiers in Texas on Thursday. But the tragedy points a bright light at a problem that's been obvious for a long time: The US makes an insuffficient investment in the mental health of its soldiers.