Here is an update on the Ft. Hood situation. The alleged gunman, 33 year old Army specialist Ivan Lopez, is dead at the scene of an apparent self-inflicted gunshot wound. Three others have died, and several more are in hospital with wounds of varying degrees of seriousness.
At least one source I've seen suggests Lopez suffered from PTSD and was supposed to be on meds. He was reported to be in uniform when he died. Information about a motive is not yet available. See a Washington Post article for details.