Weapons of mass destruction and “potential instruments of terrorism” could be at risk of entering the country through cargo rail shipments, according to a new watchdog report.
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The scathing inspector general investigation claims Customs and Border Protection agents working at ports of entry aren’t properly screening rail cargo coming in from Mexico and Canada. In turn, CBP cannot say for sure whether they made the right move in releasing various “high-risk” shipments into the U.S.

CBP policy requires port inspectors to use “large-scale non-intrusive inspection equipment” to scan shipments that its automated system flags as high risk. This process is supposed to let inspectors screen cargo for everything from drugs to weapons to other contraband.