Traps had been laid. A NEWSWEEK correspondent watched as other fighters brazenly planted more than a dozen hidden bombs, or improvised explosive devices (IEDs). First they set fires inside tires lying in the street, which melted the macadam underneath. Then they sank the IEDs into the molten asphalt and let them cool. Within hours, there was no sign of the devices, which could be detonated with the remote control of a car alarm whenever Coalition vehicles passed by.