Gravel and Dragon Teeth

A basic part of the Igloo White concept was scattering thousands of small, antipersonnel mines.  Some contained enough explosives to injure personnel working on the Trail.  Others were noisemakers whose small explosions alerted nearby sensors to the presence of the enemy in the area near the sensors.  Some attacks on the road were followed by the delivery of canisters of gravel to cover the area that needed to be repaired.

  
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