The Nuclear Emergency Support Team (NEST) is NNSA’s multi-mission nuclear emergency response capability that leverages the Department of Energy’s (DOE) world-class scientists and technical experts to contend with the Nation’s most pressing radiological and nuclear challenges. NEST is the umbrella designation that encompasses all DOE/NNSA radiological and nuclear emergency response functions, some of which date back more than 60 years. These include all field-deployed and remote technical support to the Nation’s countering weapons of mass destruction (WMD) operations, including Preventive Nuclear and Radiological Detection (PNRD) and threat-based nuclear search; public health and safety missions, including radiological consequence management; and responses to U.S. nuclear weapon accidents and incidents.