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Testimony before the Subcommittee on Financial Management and Accountability, Committee on Governmental Affairs, United States Senate
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Testimony before the Committee on Science, U.S. House of Representatives
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Testimony before the Committee on the Budget, U.S. House of Representatives
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Testimony before the Subcommittee on Government Management, Information and Technology, Committee on Government Reform and Oversight, U.S. House of Representatives
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Testimony before the Committee on the Budget, United States Senate
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Testimony before the Committee on the Budget, U.S. House of Representatives
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Testimony before the Committee on the Budget, U.S. House of Representatives