1. Energy Department (2013) The National Nuclear Security Administration’s weapons dismantlement and disposition program. Audit report, January. Available at: http://energy.gov/sites/prod/files/OAS-L-13-06.pdf.
2. Energy Department (2014a) National Nuclear Security Administration nuclear weapons systems configuration management. Audit report, March 26. Office of Inspector General. Available at: http://energy.gov/ig/downloads/audit-report-doeig-0902.
3. GAO (2014) Nuclear weapons: Actions needed by NNSA to clarify dismantlement performance goal. Report, April. Available at: http://www.gao.gov/assets/670/662840.pdf.
4. Global nuclear weapons inventories, 1945–2013