sound wall

Today the flying fighter with supersonic speed becomes popular in the air force of the world.

Super airplanes with speed exceeding the speed of sound 6 times were no longer fiction stories. Therefore, it is no longer difficult to witness the beautiful scene when the

Austrian sports athlete Felix Baumgartner has just announced a breakdown plan

A company, called the International Maritime Security System, is offering an expensive defense package called the anti-piracy triton control system. The mixed product will include