In the category of "Why?"

From Reuters:
"Multiple shooting incidents are not uncommon in the United States, where there are relatively lax gun controls.
Fort Hood personnel have accounted for more suicides than any other Army post since the U.S. invasion of Iraq in 2003, with 75 tallied through July of this year.
Fort Hood isn't Iraq or Afghanistan. It was a protected US military base, home to more than 40,000 soldiers.

Or...this from the BBC:
"...this wasn't Iraq or Afghanistan. It was a protected US military base, home to more than 40,000 soldiers.
A place that was meant to be out of harm's way."


Damn.