In a May 28, 2010 letter to a coalition of organizations, the Transportation Security Administration defended its use of full body scanner machines. The Agency claimed that the machines are safe, effective, and do not violate existing statutes or impermissibly infringe on Americans' Constitutional Rights. This letter is a response to an April 21, 2010 petition in which EPIC and 30 organizations urged the TSA to suspend the full body scanner program due to Constitutional, statutory, health, and effectiveness concerns. In 2009, the organizations petitioned the agency to undertake a formal request for public comments. The agency never acted on the request. For more information, see EPIC: Whole Body Imaging Technology and EPIC v. Department of Homeland Security.