The future of homeland security : hearings before the Committee on Homeland Security and Governmental Affairs, United States Senate, One Hundred Twelfth Congress, second session : evolving and emerging threats, July 11, 2012 ; the evolution of the Homeland Security Department's roles and missions, July 12, 2012 .
Imprint
Washington : U.S. G.P.O. : For sale by the Supt. of Docs., U.S. G.P.O., 2012.
