Forcefield like shield pioneered
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This new system, developed by Iran uses radar to track incoming projectiles, then uses a 'secret countermeasure' to detonate the head on the RPG/missile before it hits, meaning the only damage is done by the weight of the missile hitting. It's not exactly a forcefield, but from the video it looks pretty similar.
[kml_flashembed movie="http://www.youtube.com/v/-yVdwvodPo8" height="350" width="425" /]

Developed by Israel, not Iran. Those terrorist monkeys would never be able to come up wth such tech.
~Long Live the Free Countries of the World (not USA obviously)