Another Ambush Kills Four Soldiers
An IED takes out a humvee with 4 marines, and 1 interpreter
The IED’s Need A Signal Source For Detonation
So What Is Closing The Relay?
Manual —————- An Arab in the bushes?
Cell Phone ———— Targets are moving fast
Electronic Trigger — Attached to vehicle
These IEDs were set off by timers on the vehicles
The insurgents knew their targets were coming. Notice they pick certain vehicles in a convoy.