A Weapons of Mass Destruction Civil Support Team (WMD-CST or CST) supports civil authorities in the event of the use, or threatened use, of a weapon of mass destruction. CSTs are federally funded units established under Presidential Decision Directive 39. There are 57 National Guard and one Army Reserve full-time teams: one in every U.S. state, Washington, D.C., Puerto Rico, Germany, Guam, and the US Virgin Islands with an additional team each in California, Florida, and New York.
The mission of the WMD-CST is to support civil authorities at the direction of the Governor, at domestic CBRN incident sites by identifying CBRN agents/substances, assessing current and projected consequences, advising on response measures, and assisting with requests for additional support. In the National Defense Authorization Act (NDAA), Fiscal Year (FY) 2007, Congress expanded the operational incidents a WMD-CST could be used to include the intentional or unintentional release of CBRN and natural or man-made disasters in the United States that result, or could result, in the catastrophic loss of life or property.
The WMD-CSTs are National Guard units designed to provide a specialized capability to respond to a chemical, biological, radiological or nuclear (CBRN) incident primarily in a Title 32 operational status within the United States, the District of Columbia, its territories and possessions, as established by 10 USC §12310. Congress, the President, and DoD recognized that the WMD-CSTs, {responding under the authority of the Governor (Only for the National Guard)}, provide significant capabilities to assist local and state agencies that may be overwhelmed by a large-scale terrorist attack or where specific technical capabilities to identify CBRN materials are required. In October 1998, Congress authorized and funded the fielding of the first 10 WMD-CSTs. With this fielding began the development and evolution of new capabilities and concepts to ensure that DoD could support evolving interagency response plans. Since 1998, Congress has authorized and funded the fielding of WMD-CSTs in the remaining States and territories.