At the Mexico-Texas border, a giant x-ray machine has been installed. It uses extremely low level radiation to detect hidden… stuff in vehicles. If this was used more widely, immigration attorneys might need to start thinking about a career change. The x-rays are extremely weak- dousing vehicles in about such low levels of radiation that it is considered safe to be inspected by it daily. This is the same technology being used at airports, only it is a much larger machine.