%0 Generic %T Current and future worldwide threats to the national security of the United States hearing before the Committee on Armed Services, United States Senate, One Hundred Tenth Congress, first session, February 27, 2007. %U https://ezaccess.libraries.psu.edu/login?url=http://congressional.proquest.com/congcomp/getdoc?HEARING-ID=HRG-2007-SAS-0018