Twenty-one members of the Saudi military are being expelled from the US after a cadet carried out a mass shooting at the air base last month.
The servicemen are not accused of aiding the 21-year old Saudi Air Force lieutenant.
But US Attorney General William Barr said the cadets were found to have had jihadist material and indecent images of children in their possession.
Three sailors were killed and eight wounded in the 6 December attack.
Training for Saudi servicemen was put on hold in the US after the attack.