Photos: Military tests RFID technology

NATO forces have been testing a range of combat identification technologies on Salisbury Plain. This Challenger 2 tank was used in one of the trials.

This M1 Abrams tank was among the U.S. forces used in the NATO "Urgent Quest" exercise.

The tech on trial would warn troops if they were about to fire one of these anti-tank missiles at a friendly vehicle by mistake.

This Bradley was among the U.S. forces on display.

This Warrior armored vehicle accompanied British forces through mud and rain.