Once the Secure Freight Initiative has been implemented, U.S. authorities should have no trouble distinguishing "the kitty litter from the dirty bomb" when scanning cargo containers for radiation, Chertoff says. Scanning 100 percent of all cargo is not feasible and would result in clogged ports and supply chains, Chertoff says, explaining, "If I shut them, there won’t be any risk, but there won’t be any ports."
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