As though this should surprise anyone. The Fallujah rebels have decided that the only weapons they're required to turn in are ones that don't work.
According to UN logic (not to mention that of Sen. Kerry), they're probably doing this because they don't trust us not to massacre them once they're defenseless. We should probably withdraw from the city and let the families back in to prove to them we're ncie guys.
Or we could kill every last one of them, just to show what happens when they don't comply. Al Sadr, take note. Then take cover.