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CBP agreed with our recommendation on CSI 's staffing model and said that modifications to the model would allow for program objectives to be achieved in a cost-effective manner . Currents underwater can have the same effect that wind does on a terrestrial crime scene , so you won ’ t normally find divers combing for hairs or pollen grains like the folks on CSI . CBP officials told us that between July 2004 and September 2004 , 93 percent of the shipments placed on CSI for domestic exam hold were actually inspected at a U.S. port . To ascertain the degree to which high-risk shipments were targeted and inspected overseas , we obtained data on CSI targeting and inspection activity for each of the CSI ports . Even the sleuths on CSI would n't be able to tell whether a bomb in a western city originated with an Iranian leak or from the loose nuclear material floating around the former Soviet Union .