The Subcommittees on Prevention of Nuclear and Biological Attack and on Emergency Preparedness, Science, and Technology of the House Committee on Homeland Security conducted a hearing on detecting nuclear weapons and radiological materials. Mr. Vayl Oxford, Domestic Nuclear Detection Office, Department of Homeland Security, testified regarding current nuclear detection equipment and regarding equipment under development. Mr. Gene Aloise, Government Accountability Office (GAO), testified regarding problems in coordinating nuclear detection programs among the various agencies and regarding the effectiveness of radiation equipment currently deployed. Ms.