Fort hood victims to be commemorated on Tuesday's memorial service in the presence of U.S President Barack Obama and first lady Michelle Obama.
The army psychiatrist, Major Nidal Malik Hasan (39), killed 13 people and injured 38 people last Thursday at the military base Fort Hood.
FBI investigators suspect there is connection between Hasan and a radical cleric in Yemen Anwar al-Awlaki, born in USA, who is also Al Queda conspirator.
Despite four shooting wounds, Hasan survived and recovers in San Antonio hospital. The newest reports say that Hasan has talked to the nurses, but it is not known to have cooperated with the investigators.