In response to an EPIC Freedom of Information Act request, Customs and Border Protection has disclosed nearly 1,000 pages of documents on automated license plate readers and border body scanners. The documents include contracts with several companies, such as Rapiscan and L3, for vehicle and cargo screening x-ray devices. Previous documents obtained by EPIC revealed that the agency is developing integrated vehicle scanners, with backscatter x-ray, Closed Circuit Television, and automated license plate readers, that would be used with human subjects. Radiation experts have questioned the safety of these systems, which produce ionizing radiation. For more information see EPIC FOIA: Automated License Plate Readers and Border Checkpoint Body Scanners.