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The impact of background and security clearances on the transportation workforce hearing before the Subcommittee on Transportation Security and Infrastructure Protection of the Committee on Homeland Security, House of Representatives, One Hundred Tenth Congress, first session, February 16, 2007
- "The impact of background and security clearances on the transportation workforce hearing before the Subcommittee on Transportation Security and Infrastructure Protection of the Committee on Homeland Security, House of Representatives, One Hundred Tenth Congress, first session, February 16, 2007"@en
- "The impact of background and security clearances on the transportation workforce : hearing before the Subcommittee on Transportation Security and Infrastructure Protection of the Committee on Homeland Security, House of Representatives, One Hundred Tenth Congress, first session, February 16, 2007"@en