The air freight industry is seeking TSA approval to certify bomb-sniffing dogs for primary screening of cargo shipped on commercial airliners. Currently, K-9s are deployed only for secondary screening. Sources say TSA is considering a certification program that would allow private freight companies to train their own dogs for security duty. According to the TSA, there are currently 120 dogs dedicated to screening freight at the 20 top cargo airports across the U.S.
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