"There is a possibility that some will be physically impaired for the rest of their lives and some will be impaired mentally for the rest of their lives," Dr. Roy Smythe, chief of surgery at Texas A & M, told CBS News Correspondent Dean Reynolds.
Interviews are slowly beginning to paint a sharper picture of the incident and the suspect, 39-year-old Army psychiatrist Maj. Nidal Malik Hasan. And there's concern that in the chaotic attempts to stop the shooter some soldiers may have been victimized by friendly fire. But Fort Hood officials don't think so.
"It's not a friendly fire incident," said Col. John Rossi, spokesman for Fort Hood. "The confirmation of that will be of course after autopsies."
Witnesses say Hasan kept firing 100 rounds even after he was struck four times in a shootout with Police Officer Kimberly Munley. He is reportedly unconscious at Brooke Army Medical Center in San Antonio. Relatives and friends are providing more details:
# Hasan was distressed about a pending tour of duty overseas and had hired a lawyer to block it.
# He had loudly objected to the U.S. war on terror as a war on Islam.
# He felt harassed because of his faith.
An uncle recalled his complaint.
"I recall couple of things," said Rafik Hamad, Hasan's uncle in Ramallah, Palestine, "maybe he told me that one time they draw a camel and put on his car and they said 'camel jockey.'"
Officials at Hasan's local Texas mosque told CBS News Saturday that the FBI had visited with them since the shooting and they said they are cooperating in the investigation.
More Coverage of the Tragedy at Fort Hood:
Hasan's Remarks Worried Muslim Leader
Munley Was Ex-Partner's "Mighty Mouse"
List of Fort Hood Dead, Wounded
What Triggers Mass Shootings?
Hasan Likely "Lone Wolf," Officials Say
Hasan Reportedly Felt U.S. Attacked Islam
During his weekly radio address, President Obama gave voice to what many here at the fort are feeling.
"We cannot fully know what leads a man to do such a thing," Mr. Obama said. "But what we do know is that our thoughts are with every single one of the men and women who were injured at Fort Hood."
Fort Hood is planning a memorial service for Tuesday, and Mr. Obama will be among those attending.