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1/12th scale model of the Air Transportable Expeditionary Crane (ATEC) building an aircraft runway.  The model includes a vertical stay and horizontal boom allowing simultaneous front and back RoboCranes to place support truss (front) and deck plates (back).  The model is shown on top of half (7.6 m (25')) of the 15 m (25') wide by 275 m (900') long runway.