This (partial quote) from the Jerusalem Post:

US and British forces have become extremely concerned about suicide attacks since Saturday when an Iraqi driving a taxi blew himself up at a checkpoint in the southern city of Najaf, killing four American soldiers. Iraq said the man was a noncommissioned officer.
Iraqi officials say they will be more such attacks. On Monday, Iraqi Foreign Minister Naji Sabri said that more than 5,000 Arabs had come to Iraq to fight.

"Most of them want to train on martyrdom attacks," Sabri said.


I'm thinking that training probably takes its toll on the more successful prospective suicide bombers....and that maybe we could start our own clandestine training camp...."yes, you're up Achmed! A little further back...a little further...now Pull! Next!"