发行时间：2021.02.09
总页数：26
编辑：
综保科技
摘要：
transportation security: background and issues for the 117th congress
february 9, 2021
congressional research service https://crsreports.congress.gov r46678
summary
transportation security: background and issues for the 117th congress
the nation’s air, land, and marine transportation systems are designed for accessibility and efficiency, two characteristics that make them vulnerable to terrorist attack. while hardening the transportation sector is difficult, measures can be taken to deter terro...
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