((a)) ** Emergencies involving nuclear, radiological, chemical, or biological weapons**

((1)) The Secretary of Homeland Security shall develop and carry out a program for testing and improving the responses of Federal, State, and local agencies to emergencies involving nuclear, radiological, biological, and chemical weapons and related materials.

((2)) The program shall include exercises to be carried out in accordance with sections 112(c) and 238(c)(1) of title 6.

((3)) In developing and carrying out the program, the Secretary shall coordinate with the Secretary of Defense, the Director of the Federal Bureau of Investigation, the Secretary of Energy, and the heads of any other Federal, State, and local government agencies that have an expertise or responsibilities relevant to emergencies described in paragraph (1).

((b)) ** Annual revisions of programs** The Secretary of Homeland Security shall revise the program developed under subsection (a) not later than June 1 in each fiscal year covered by the program. The revisions shall include adjustments that the Secretary determines necessary or appropriate on the basis of the lessons learned from the exercise or exercises carried out under the program in the fiscal year, including lessons learned regarding coordination problems and equipment deficiencies.