EPIC has filed a Freedom of Information Act lawsuit against the Department of Homeland Security, seeking records concerning radiation emissions and exposure associated with airport full body scanners. The Department recently implemented the scanners as a primary screening mechanism for all airline travelers. In August, many senators questioned the safety of the scanners. In September, Ralph Nader also sent a letter to the Senate expressing concern about radiation exposure. Earlier this year, EPIC requested DHS to release all information about radiation emissions. DHS failed to respond to EPIC's FOIA request and when DHS also failed to reply to EPIC's administrative appeal, EPIC filed a lawsuit in federal court. Earlier EPIC FOIA lawsuits uncovered evidence that body scanners can store and record images and that the Marshals Service had captured more than 35,000 images. For more information see, EPIC v. DHS (Body scanner images) and EPIC v. DOJ (Body scanner images).