diagnosed with ptsd. it's under investigation. the exact set of events is under investigation. it's believed he walked into one of the unit buildings, open fir fired, got into a vehicle, fired from a vehicle, got out of the vehicle, walked into another vehicle and open fired again and was then engaged by local law enforcement here at ft. hood. i'm sorry? >> [ inaudible ] did he begin this thing with an argument? we heard there was an argument in the wtu and that is how this started and that he also was used a semiautomatic handgun of some kind. >> he was using a .45 caliber smith and wesson semiautomatic pistol purchased recently in the local area. i'm not aware of an argument at the wtu.