"In early October, Saudi's top religious leader, Sheik Abdel-Aziz bin Abdullah al-Sheik, issued a religious edict prohibiting sending people to Iraq
to take part in the anti-American insurgency"
That's a lot of arrests! I would imagine that the more who are arrested, the more cautious the remainder would be, and that would surely slow them
down, in addition to the harm done by the loss of those arrested.