The concave concrete structures were designed to pick up sound waves from enemy aircraft, making it possible to predict their flight trajectory, giving enough time for ground forces to be alerted ...
The U.S. Army has developed "Lego-like" concrete bricks in order to rapidly construct bridges during military campaigns. The U.S. Army Engineer Research and Development Center, a subdivision of ...
Some believe the numerous concrete cinder blocks are an effort to prevent homeless encampments and recreational vehicles (RVs) from parking in the area long-term. Recently, the heavy, bright ...