C-Store surveillance video, around 6:30am local time.
CNN reporter says c-store owner said he came in dressed like so from time to time, didn't strike him as unusual today.
via Allahpundit, on twitter.
UPDATE: 13 dead, 30 others in stable condition. Heard this morning two of the dead were civilians. Also this from the AP (and commenters in the thread), "Soldiers who witnessed the shooting rampage at Fort Hood that left 13 people dead reported that the gunman shouted "Allahu Akbar!" before opening fire, the base commander said Friday"