%0 Generic %T A review of issues associated with protecting and improving our nation's aviation satellite-based Global Positioning System infrastructure hearing before the Subcommittee on Aviation of the Committee on Transportation and Infrastructure, House of Representatives, One Hundred Twelfth Congress, second session, February 8, 2012. %U https://ezaccess.libraries.psu.edu/login?url=http://search.proquest.com/congcomp/getdoc?HEARING-ID=HRG-2012-HTI-0007