In a hearing before the House Oversight Subcommittee on National Security, EPIC urged Congress to suspend the use of airport body scanners for primary screening. EPIC said the devices were not effective and were not minimally intrusive, as courts have required for airport searches. EPIC cited TSA documents obtained in EPIC's FOIA lawsuit which showed that the machines are designed to store and transfer images, and not designed to detect powdered explosives. EPIC was joined on the panel by radiation expert Dr. David Brenner, who has frequently pointed out the radiation risks created by these machines. The TSA, which is a federal agency funded by taxpayer dollars and responsible for the body scanner program, originally refused to testify at hearing. Eventually they showed up. Chairman Jason Chaffetz, who had previously sponsored a bill regarding body scanners, grilled the TSA officials and said the hearing would continue with more questions. For more information see EPIC: Whole Body Imaging Technology and EPIC: EPIC v. DHS.