%0 Generic %T Unrest in the Middle East and North Africa ramifications for U.S. homeland security : hearing before the Subcommittee on Counterterrorism and Intelligence of the Committee on Homeland Security, House of Representatives, One Hundred Twelfth Congress, first session, April 6, 2011. %U https://ezaccess.libraries.psu.edu/login?url=http://search.proquest.com/congcomp/getdoc?HEARING-ID=HRG-2011-HSC-0002