From the AP:

...Retired Army Col. Terry Lee told Fox News that he worked with Hasan, who had hoped Obama would pull troops out of Afghanistan and Iraq. Lee said Hasan got into frequent arguments with others in the military who supported the wars, and had tried hard to prevent his pending deployment.

Hasan was single with no children. He was born in Virginia and graduated from Virginia Tech University, where he was a member of the ROTC and earned a bachelor's degree in biochemistry in 1997. He received his medical degree from the military's Uniformed Services University of the Health Sciences in Bethesda, Md., in 2001. He did his internship, residency and a fellowship at Walter Reed.