Early Prototype of S&T's Ground Penetrating Radar (image) US Department of Homeland Security - Science and Technology Share Print E-Mail Caption This is an early prototype of S&T's ground penetrating radar on display at a demonstration this spring. Engineers tested the technology in a giant sandbox to simulate conditions along the southern US border. Credit DHS S&T Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.