Reporting from Ft. Hood, Texas-- In the end, the shooting rampage at Ft. Hood came down to a gunfight between two civilian base police officers toting standard sidearms and a 39-year-old psychiatrist armed with .357 Magnum and a pistol equipped with laser sighting and extra bullets, officials said.

Army Maj. Nidal Malik Hasan, disturbed about his upcoming deployment to Afghanistan (not Iraq, contrary to earlier reports), reportedly entered the Soldier Readiness Processing Center just before 1:30 p.m. Thursday. He took a seat at a table.

It seemed as if he was there to help soldiers who were undergoing medical exams and finishing paperwork before shipping out to war. Hasan, who had prayed at his mosque that morning, allegedly mumbled something to himself -- it may have been a prayer -- then jumped up. Witnesses reported that he said: "Allahu akbar," Arabic for "God is great."

After that, the blood began to flow. Thirteen people would die; 38 others were injured.

As investigators began their probe into the motivations of the gunman, President Obama urged people Friday to reserve judgment until more is known. Base commander Lt. Gen. Robert Cone said that Hasan remained hospitalized, unconscious and on a ventilator.

Friday, as government officials and eyewitnesses gave their accounts, a clearer picture of the attack emerged.