Who is Nidal Malik Hasan?
Education: 1997 graduate of Virginia Tech University. Received doctorate in psychiatry from the Uniformed Services University of the Health Sciences in Bethesda, Md.
Career: U.S. Army psychiatrist. As of Oct. 13, he had less than a year of clinical practice. From 2003 through this summer, was an intern, a resident and then a fellow at Walter Reed Army Medical Center in Washington D.C. Also, he was listed by the Center for the Study of Traumatic Stress as a fellow for disaster and preventive psychology.
Commissioned as a captain, he was promoted to major in May.
He passed tests in September: He showed no sign of physical or mental problems in examinations as recent as September.
Personal information: He was single and had no children. His former imam Faizul Khan said of his search for a marriage partner: "I don't think he ever had a match [at the mosque], because he had too many conditions. He wanted a girl who was very religious, prays five times a day, which is all very good."
He has two brothers, one living in Virginia and another in Jerusalem, his cousin Nader Hasan said.
Religion: He attended the Muslim Community Center in Silver Spring, Md., and was devout, Khan said. He attended prayers at least once a day, seven days a week, often in his Army fatigues, Khan said.